diff --git a/.github/workflows/unit_tests.yml b/.github/workflows/unit_tests.yml
index 4f9a2249ef..7e681d299f 100644
--- a/.github/workflows/unit_tests.yml
+++ b/.github/workflows/unit_tests.yml
@@ -12,17 +12,27 @@ jobs:
     runs-on: ubuntu-22.04
     steps:
     - uses: actions/checkout@v2
+
     - name: Set up Python 3.10
       uses: actions/setup-python@v2
       with:
         python-version: "3.10"
-    - name: Install dependencies
+
+    # Note: we could try and cache the pre-commit environment
+    # See the pre-commit docs at https://pre-commit.com/#github-actions-example
+    - name: Run pre-commit hooks
       run: |
         python -m pip install --upgrade pip
+        pip install pre-commit
+        pre-commit run --all-files
+
+    - name: Install dependencies
+      run: |
         sudo apt-get update
         sudo apt install -y libgirepository1.0-dev gir1.2-gtk-4.0 libgtksourceview-5-dev
         pip install --user -e git+https://github.com/getting-things-gnome/liblarch.git#egg=liblarch
         pip install --user pytest pycairo PyGObject caldav lxml
     - name: Run unit tests with Pytest
+
       run: |
         ./run-tests
diff --git a/.github/workflows/weekly_flatpak.yml b/.github/workflows/weekly_flatpak.yml
index 396ea269aa..5f7444de6a 100644
--- a/.github/workflows/weekly_flatpak.yml
+++ b/.github/workflows/weekly_flatpak.yml
@@ -19,4 +19,3 @@ jobs:
         bundle: org.gnome.GTG.Devel.flatpak
         manifest-path: build-aux/org.gnome.GTG.Devel.json
         cache-key: flatpak-builder-${{ github.sha }}
-
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
new file mode 100644
index 0000000000..fd16ba2dc3
--- /dev/null
+++ b/.pre-commit-config.yaml
@@ -0,0 +1,10 @@
+# See https://pre-commit.com for more information
+# See https://pre-commit.com/hooks.html for more hooks
+repos:
+-   repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v3.2.0
+    hooks:
+    -   id: trailing-whitespace
+    -   id: end-of-file-fixer
+    -   id: check-yaml
+    -   id: check-added-large-files
diff --git a/GTG/backends/unmaintained/README.txt b/GTG/backends/unmaintained/README.txt
index d7b2941736..cb8cb0ea73 100644
--- a/GTG/backends/unmaintained/README.txt
+++ b/GTG/backends/unmaintained/README.txt
@@ -5,7 +5,7 @@ and support them.
 If you are interested in taking over one of these, let us know in the bug
 tracker!
 
---- 
+---
 
 Evolution synchronization service has dependencies:
   * python3-evolution
@@ -27,4 +27,3 @@ version of Tweety library.
 
 Remember the Milk synchronization service is shipped with a library for RTM api. It has an external dependency:
   * python3-dateutil
-
diff --git a/GTG/core/base_store.py b/GTG/core/base_store.py
index 0807f37a71..49a7bf4b98 100644
--- a/GTG/core/base_store.py
+++ b/GTG/core/base_store.py
@@ -105,7 +105,7 @@ def remove(self, item_id: UUID) -> None:
         """Remove an existing item from the store."""
 
         item = self.lookup[item_id]
-        
+
         try:
             parent = item.parent
 
diff --git a/GTG/core/datastore.py b/GTG/core/datastore.py
index b4a14b419d..483f80ee57 100644
--- a/GTG/core/datastore.py
+++ b/GTG/core/datastore.py
@@ -236,13 +236,13 @@ def count_tasks(count: dict, tasklist: list):
             'closed': {'all': 0, 'untagged': 0},
         }
 
-        count_tasks(self.task_count['open'], 
+        count_tasks(self.task_count['open'],
                     self.tasks.filter(Filter.ACTIVE))
 
-        count_tasks(self.task_count['closed'], 
+        count_tasks(self.task_count['closed'],
                     self.tasks.filter(Filter.CLOSED))
 
-        count_tasks(self.task_count['actionable'], 
+        count_tasks(self.task_count['actionable'],
                     self.tasks.filter(Filter.ACTIONABLE))
 
 
@@ -259,7 +259,7 @@ def refresh_tag_stats(self) -> None:
 
     def notify_tag_change(self, tag) -> None:
         """Notify tasks that this tag has changed."""
-        
+
         for task in self.tasks.lookup.values():
             if tag in task.tags:
                 task.notify('icons')
@@ -280,14 +280,14 @@ def do_first_run_versioning(self, filepath: str) -> None:
         """If there is an old file around needing versioning, convert it, then rename the old file."""
 
         old_path = self.find_old_path(DATA_DIR)
-        
+
         if old_path is not None:
             log.warning('Found old file: %r. Running versioning code.', old_path)
             tree = versioning.convert(old_path, self)
             self.load_data(tree)
             self.save(filepath)
             os.rename(old_path, old_path + '.imported')
-            
+
         else:
             self.first_run(self.data_path)
 
@@ -297,13 +297,13 @@ def find_old_path(self, datadir: str) -> None | str:
 
         # used by which version?
         path = os.path.join(datadir, 'gtg_tasks.xml')
-        
+
         if os.path.isfile(path):
             return path
-        
+
         # used by (at least) 0.3.1-4
         path = os.path.join(datadir, 'projects.xml')
-        
+
         if os.path.isfile(path):
             return self.find_old_uuid_path(path)
 
@@ -315,7 +315,7 @@ def find_old_uuid_path(self, path: str) -> None | str:
 
         with open(path, 'r') as stream:
             xml_tree = et.parse(stream)
-            
+
         for backend in xml_tree.findall('backend'):
             module = backend.get('module')
             if module == 'backend_localfile':
diff --git a/GTG/core/filters.py b/GTG/core/filters.py
index 4207f4a635..0b1c056fcb 100644
--- a/GTG/core/filters.py
+++ b/GTG/core/filters.py
@@ -26,9 +26,9 @@
 
 def unwrap(row, expected_type):
     """Find an item in TreeRow widget (sometimes nested)."""
-    
+
     item = row.get_item()
-    
+
     while type(item) is not expected_type:
         item = item.get_item()
 
@@ -58,7 +58,7 @@ def do_match(self, item) -> bool:
 
         else:
             return True
-            
+
 
 class TaskPaneFilter(Gtk.Filter):
     __gtype_name__ = 'TaskPaneFilter'
@@ -90,13 +90,13 @@ def get_children(children: set) -> None:
 
             if tag.children:
                 get_children(tag.children)
-                
+
         return result
 
 
     def match_tags(self, task: Task) -> bool:
         """Match selected tags to task tags."""
-        
+
         all_tags = self.expand_tags()
         return len(all_tags.intersection(set(task.tags))) >= len(self.tags)
 
@@ -108,7 +108,7 @@ def do_match(self, item) -> bool:
             show = task.status is Status.ACTIVE
         elif self.pane == 'workview':
             show = task.is_actionable
-            
+
             if self.expand:
                 item.set_expanded(True)
                 self.expand = False
@@ -144,7 +144,7 @@ def __init__(self, ds, pane):
 
     def set_query(self, query: str) -> None:
         self.query = query
-        
+
         try:
             self.checks = search.parse_search_query(query)
         except search.InvalidQuery:
@@ -153,7 +153,7 @@ def set_query(self, query: str) -> None:
 
     def match_tags(self, task: Task) -> bool:
         """Match selected tags to task tags."""
-        
+
         return len(self.tags.intersection(set(task.tags))) >= len(self.tags)
 
 
@@ -179,4 +179,4 @@ def do_match(self, item) -> bool:
 
             return search.search_filter(task, self.checks)
         else:
-            return False
\ No newline at end of file
+            return False
diff --git a/GTG/core/firstrun_tasks.py b/GTG/core/firstrun_tasks.py
index 42bbaba83e..c9610525e5 100644
--- a/GTG/core/firstrun_tasks.py
+++ b/GTG/core/firstrun_tasks.py
@@ -410,5 +410,5 @@ def generate() -> etree.Element:
         tag_tag = etree.SubElement(taglist, 'tag')
         tag_tag.set('id', tid)
         tag_tag.set('name', tag)
-        
+
     return etree.ElementTree(root)
diff --git a/GTG/core/info.py.in b/GTG/core/info.py.in
index 7b82ce63dc..9586e3264c 100644
--- a/GTG/core/info.py.in
+++ b/GTG/core/info.py.in
@@ -58,7 +58,7 @@ AUTHORS_RELEASE_CONTRIBUTORS = """
 • François Schmidts
 • Sebastian Grabowski
 • Fridolin Weisser
-• Tommy Priest 
+• Tommy Priest
 • Laurent Combe
 • Smitty
 • Tiziana Sellitto
diff --git a/GTG/core/plugins/api.py b/GTG/core/plugins/api.py
index 7fe7f3d095..01e898e522 100644
--- a/GTG/core/plugins/api.py
+++ b/GTG/core/plugins/api.py
@@ -51,7 +51,7 @@ def __init__(self,
         self.app = app
         self.ds = app.ds
         self.browser = app.browser
-        
+
         self.selection_changed_callback_listeners = []
 
         if taskeditor:
@@ -60,7 +60,7 @@ def __init__(self,
         else:
             self.__ui = self.browser
             self.__task_id = None
-            
+
             for pane in self.browser.panes.values():
                 pane.task_selection.connect('selection-changed', self.__selection_changed, pane)
 
diff --git a/GTG/core/saved_searches.py b/GTG/core/saved_searches.py
index 10220c3c28..675d645930 100644
--- a/GTG/core/saved_searches.py
+++ b/GTG/core/saved_searches.py
@@ -172,7 +172,7 @@ def new(self, name: str, query: str, parent: UUID = None) -> SavedSearch:
             self.model.append(search)
 
         return search
-    
+
 
     def add(self, item, parent_id: UUID = None) -> None:
         """Add a tag to the tagstore."""
diff --git a/GTG/core/sorters.py b/GTG/core/sorters.py
index f2e8fb1178..0eb5464f4c 100644
--- a/GTG/core/sorters.py
+++ b/GTG/core/sorters.py
@@ -23,9 +23,9 @@
 
 def unwrap(row, expected_type):
     """Find an item in TreeRow widget (sometimes nested)."""
-    
+
     item = row
-    
+
     while type(item) is not expected_type:
         item = item.get_item()
 
@@ -40,7 +40,7 @@ def __init__(self):
 
 
     def do_compare(self, a, b) -> Gtk.Ordering:
-        
+
         a = unwrap(a, Task)
         b = unwrap(b, Task)
 
@@ -63,7 +63,7 @@ def __init__(self):
 
 
     def do_compare(self, a, b) -> Gtk.Ordering:
-        
+
         a = unwrap(a, Task)
         b = unwrap(b, Task)
 
@@ -86,7 +86,7 @@ def __init__(self):
 
 
     def do_compare(self, a, b) -> Gtk.Ordering:
-        
+
         a = unwrap(a, Task)
         b = unwrap(b, Task)
 
@@ -109,7 +109,7 @@ def __init__(self):
 
 
     def do_compare(self, a, b) -> Gtk.Ordering:
-        
+
         a = unwrap(a, Task)
         b = unwrap(b, Task)
 
@@ -133,14 +133,14 @@ def __init__(self):
 
     def get_first_letter(self, tags) -> str:
         """Get first letter of the first tag in a set of tags."""
-        
+
         # Fastest way to get the first item
         # on a set in Python
         for t in tags:
             return t.name[0]
 
     def do_compare(self, a, b) -> Gtk.Ordering:
-        
+
         a = unwrap(a, Task)
         b = unwrap(b, Task)
 
@@ -170,7 +170,7 @@ def __init__(self):
 
 
     def do_compare(self, a, b) -> Gtk.Ordering:
-        
+
         a = unwrap(a, Task)
         b = unwrap(b, Task)
 
@@ -183,4 +183,3 @@ def do_compare(self, a, b) -> Gtk.Ordering:
             return Gtk.Ordering.SMALLER
         else:
             return Gtk.Ordering.EQUAL
-
diff --git a/GTG/core/tags.py b/GTG/core/tags.py
index 71f0afb68d..a4e62698c1 100644
--- a/GTG/core/tags.py
+++ b/GTG/core/tags.py
@@ -129,7 +129,7 @@ def has_icon(self) -> bool:
 
         return self._icon
 
-    
+
     @GObject.Property(type=int, default=0)
     def task_count_open(self) -> int:
 
@@ -174,8 +174,8 @@ def get_ancestors(self) -> List['Tag']:
 
     def __hash__(self):
         return id(self)
-        
-        
+
+
 class TagStore(BaseStore):
     """A tree of tags."""
 
@@ -219,7 +219,7 @@ def __str__(self) -> str:
     def get_all_tag_names(self) -> List[str]:
         """Return all tag names."""
         return list(self.lookup_names.keys())
-    
+
 
     def find(self, name: str) -> Tag:
         """Get a tag by name."""
@@ -340,7 +340,7 @@ def rand_color() -> str:
             r = random.randint(0, 255)
             g = random.randint(0, 255)
             b = random.randint(0, 255)
-             
+
             return f'#{r:02x}{g:02x}{b:02x}'
 
         color = rand_color()
diff --git a/GTG/core/tasks.py b/GTG/core/tasks.py
index 8abb5f6bb9..2166606aa2 100644
--- a/GTG/core/tasks.py
+++ b/GTG/core/tasks.py
@@ -108,7 +108,7 @@ def __init__(self, id: UUID, title: str) -> None:
         self._is_recurring = False
         self.recurring_term = None
         self.recurring_updated_date = datetime.datetime.now()
-        
+
         self.attributes = {}
 
         self.duplicate_cb = NotImplemented
@@ -162,7 +162,7 @@ def set_status(self, status: Status, propagated: bool = False) -> None:
         if self.status == Status.ACTIVE:
             for t in self.tags:
                 t.task_count_open -= 1
-            
+
             if self.is_actionable:
                 for t in self.tags:
                     t.task_count_actionable -= 1
@@ -184,10 +184,10 @@ def set_status(self, status: Status, propagated: bool = False) -> None:
             #   1- It is recurring.
             #   2- It has no parent or no recurring parent.
             #   3- It was directly marked as done (not by propagation from its parent).
-            if (self._is_recurring and not propagated and 
+            if (self._is_recurring and not propagated and
                  not self.is_parent_recurring()):
                 self.duplicate_cb(self)
-            
+
         else:
             self.date_closed = Date.no_date()
 
@@ -197,7 +197,7 @@ def set_status(self, status: Status, propagated: bool = False) -> None:
         if status == Status.ACTIVE:
             for t in self.tags:
                 t.task_count_open += 1
-            
+
             if self.is_actionable:
                 for t in self.tags:
                     t.task_count_actionable += 1
@@ -206,7 +206,7 @@ def set_status(self, status: Status, propagated: bool = False) -> None:
             for t in self.tags:
                 t.task_count_closed += 1
 
-            
+
         for child in self.children:
             child.set_status(status, propagated=True)
 
@@ -220,7 +220,7 @@ def date_due(self) -> Date:
     def date_due(self, value: Date) -> None:
         self._date_due = value
         self.has_date_due = bool(value)
-        
+
         if value:
             self.date_due_str = self._date_due.to_readable_string()
         else:
@@ -228,9 +228,9 @@ def date_due(self, value: Date) -> None:
 
         for tag in self.tags:
             if self.is_actionable:
-                tag.task_count_actionable += 1 
+                tag.task_count_actionable += 1
             else:
-                tag.task_count_actionable -= 1 
+                tag.task_count_actionable -= 1
 
         if not value or value.is_fuzzy():
             return
@@ -329,9 +329,9 @@ def add_tag(self, tag: Tag) -> None:
 
                 if self.status == Status.ACTIVE:
                     tag.task_count_open += 1
-                else: 
+                else:
                     tag.task_count_closed += 1
-                
+
                 if self.is_actionable:
                     tag.task_count_actionable += 1
         else:
@@ -347,9 +347,9 @@ def remove_tag(self, tag_name: str) -> None:
 
                 if self.status == Status.ACTIVE:
                     t.task_count_open -= 1
-                else: 
+                else:
                     t.task_count_closed -= 1
-                
+
                 if self.is_actionable:
                     t.task_count_actionable -= 1
 
@@ -388,7 +388,7 @@ def set_recurring(self, recurring: bool, recurring_term: str = None, newtask=Fal
         when creating a new task, the due date is calculated from either the
         current date or the start date, while we get the next occurrence of a
         task not from the current date but from the due date itself.
-        
+
         However when we are retrieving the task from the XML files, we should
         only set the the recurring_term.
 
@@ -460,7 +460,7 @@ def is_valid_term():
 
                 if self._is_recurring:
                     child.date_due = newdate
-        
+
         self.notify('is_recurring')
 
 
@@ -490,9 +490,9 @@ def inherit_recursion(self):
 
     def is_parent_recurring(self):
         """Determine if the parent task is recurring."""
-        
-        return (self.parent and 
-                self.parent.status == Status.ACTIVE 
+
+        return (self.parent and
+                self.parent.status == Status.ACTIVE
                 and self.parent._is_recurring)
 
 
@@ -514,7 +514,7 @@ def get_next_occurrence(self):
         """
 
         today = datetime.date.today()
-        
+
         if today <= self.date_due:
             try:
                 nextdate = self.date_due.parse_from_date(self.recurring_term, newtask=False)
@@ -533,7 +533,7 @@ def get_next_occurrence(self):
 
                 while next_date < datetime.date.today():
                     next_date = next_date.parse_from_date(self.recurring_term, newtask=False)
-                    
+
                 return next_date
 
             except Exception:
@@ -543,8 +543,8 @@ def get_next_occurrence(self):
     # Bind Properties
     #
     # Since PyGobject doesn't support bind_property_full() yet
-    # we can't do complex binds. These props below serve as a 
-    # workaround so that we can use them with the regular 
+    # we can't do complex binds. These props below serve as a
+    # workaround so that we can use them with the regular
     # bind_property().
     # -----------------------------------------------------------------------
 
@@ -630,7 +630,7 @@ def row_css(self) -> str:
 
     @GObject.Property(type=str)
     def tag_colors(self) -> str:
-        return ','.join(t.color for t in self.tags 
+        return ','.join(t.color for t in self.tags
                         if t.color and not t.icon)
 
 
@@ -642,7 +642,7 @@ def show_tag_colors(self) -> str:
     @property
     def tag_names(self) -> list[str]:
         return [ t.name for t in self.tags ]
-    
+
 
     def set_attribute(self, att_name, att_value, namespace="") -> None:
         """Set an arbitrary attribute."""
@@ -730,14 +730,14 @@ def get(self, tid: UUID) -> Task:
 
     def duplicate_for_recurrent(self, task: Task) -> Task:
         """Duplicate a task for the next ocurrence."""
-        
+
         new_task = self.new(task.title)
         new_task.tags = task.tags
         new_task.content = task.content
         new_task.date_added = task.date_added
         new_task.date_due = task.get_next_occurrence()
 
-        # Only goes through for the first task 
+        # Only goes through for the first task
         if task.parent and task.parent.is_active:
             self.parent(new_task.id, task.parent.id)
 
@@ -747,7 +747,7 @@ def duplicate_for_recurrent(self, task: Task) -> Task:
 
         log.debug("Duplicated task %s as task %s", task.id, new_task.id)
         return new_task
-        
+
 
     def new(self, title: str = None, parent: UUID = None) -> Task:
         """Create a new task and add it to the store."""
@@ -901,7 +901,7 @@ def add(self, item: Any, parent_id: UUID = None) -> None:
 
         if not parent_id:
             self.model.append(item)
-        
+
         item.duplicate_cb = self.duplicate_for_recurrent
         self.notify('task_count_all')
         self.notify('task_count_no_tags')
@@ -1027,7 +1027,7 @@ def task_count_all(self) -> str:
     @GObject.Property(type=str)
     def task_count_no_tags(self) -> str:
         i = 0
-        
+
         for task in self.lookup.values():
             if not task.tags:
                 i += 1
diff --git a/GTG/gtk/application.py b/GTG/gtk/application.py
index 43503210b0..bf854b0bdb 100644
--- a/GTG/gtk/application.py
+++ b/GTG/gtk/application.py
@@ -119,7 +119,7 @@ def do_startup(self):
 
             self.config_core = CoreConfig()
             self.config = self.config_core.get_subconfig('browser')
-            self.config_plugins = self.config_core.get_subconfig('plugins') 
+            self.config_plugins = self.config_core.get_subconfig('plugins')
 
             self.clipboard = clipboard.TaskClipboard(self.ds)
 
@@ -150,7 +150,7 @@ def do_activate(self):
         try:
             self.init_shared()
             self.browser.present()
-            self.browser.restore_editor_windows() 
+            self.browser.restore_editor_windows()
 
             log.debug("Application activation finished")
         except Exception as e:
@@ -337,7 +337,7 @@ def new_subtask(self, param, action):
 
     def add_parent(self, param, action):
         """Callback to add a parent to a task"""
-        
+
         self.browser.on_add_parent()
 
 
@@ -365,7 +365,7 @@ def dismiss(self, param, action):
             self.browser.on_dismiss_task()
         finally:
             self.browser.get_pane().refresh()
-    
+
     def reopen(self, param, action):
         """Callback to mark task as open."""
 
@@ -455,7 +455,7 @@ def purge_old_tasks(self, widget=None):
         today = Date.today()
         max_days = self.config.get('autoclean_days')
         closed_tasks = self.ds.tasks.filter(Filter.CLOSED)
-        
+
         to_remove = [t for t in closed_tasks
                      if (today - t.date_closed).days > max_days]
 
@@ -549,7 +549,7 @@ def open_task(self, task, new=False):
             If a Task editor is already opened for a given task, we present it.
             Otherwise, we create a new one.
         """
-        
+
         if task.id in self.open_tasks:
             editor = self.open_tasks[task.id]
             editor.present()
diff --git a/GTG/gtk/browser/adaptive_button.py b/GTG/gtk/browser/adaptive_button.py
index db6fbac53e..7340dc2ee4 100644
--- a/GTG/gtk/browser/adaptive_button.py
+++ b/GTG/gtk/browser/adaptive_button.py
@@ -293,4 +293,3 @@ def do_set_child_property(self, child: Gtk.Widget, property_id: int,
         # We don't have any child properties anyway
         log.debug("Unimplemented child=%r, property_id=%r, value=%r, pspec=%r",
                   child, property_id, value, pspec)
-
diff --git a/GTG/gtk/browser/delete_task.py b/GTG/gtk/browser/delete_task.py
index bd6337b012..af83e07242 100644
--- a/GTG/gtk/browser/delete_task.py
+++ b/GTG/gtk/browser/delete_task.py
@@ -58,7 +58,7 @@ def recursive_list_tasks(self, tasklist, root):
             tasklist.append(root)
 
             [self.recursive_list_tasks(tasklist, t)
-             for t in root.children 
+             for t in root.children
              if t not in tasklist]
 
 
diff --git a/GTG/gtk/browser/main_window.py b/GTG/gtk/browser/main_window.py
index 568e21506b..6520792ea4 100644
--- a/GTG/gtk/browser/main_window.py
+++ b/GTG/gtk/browser/main_window.py
@@ -491,7 +491,7 @@ def on_search(self, data):
 
     def on_save_search(self, action, param):
         query = self.search_entry.get_text()
-        name = re.sub(r'!(?=\w)+', '', query) 
+        name = re.sub(r'!(?=\w)+', '', query)
 
         self.app.ds.saved_searches.new(name, query)
 
@@ -773,9 +773,9 @@ def on_quickadd_activate(self, widget) -> None:
             tasks = self.get_pane().get_selection()
             for t in tasks:
                 self.app.open_task(t)
-            
+
             return
-            
+
         tags = self.sidebar.selected_tags(names_only=True)
         data = quick_add.parse(text)
 
@@ -975,20 +975,20 @@ def on_add_subtask(self, widget=None):
 
     def on_add_parent(self, widget=None):
         selection = self.get_pane().get_selection()
-        
+
         if not selection:
             return
-        
+
         parent = selection[0].parent
 
         # Check all tasks have the same parent
         if any(t.parent != parent for t in selection):
             return
-        
+
         if parent:
             if parent.status == Status.ACTIVE:
                 new_parent = self.app.ds.tasks.new(parent=parent.id)
-                
+
                 for task in selection:
                     self.app.ds.tasks.refresh_lookup_cache()
                     self.app.ds.tasks.unparent(task.id, parent.id)
@@ -999,7 +999,7 @@ def on_add_parent(self, widget=None):
             for task in selection:
                 self.app.ds.tasks.refresh_lookup_cache()
                 self.app.ds.tasks.parent(task.id, new_parent.id)
-        
+
             self.app.open_task(new_parent)
             self.get_pane().refresh()
 
@@ -1210,43 +1210,43 @@ def on_sort_start(self, action, params) -> None:
         """Callback when changing task sorting."""
 
         self.get_pane().set_sorter('Start')
-        
+
 
     def on_sort_due(self, action, params) -> None:
         """Callback when changing task sorting."""
-        
+
         self.get_pane().set_sorter('Due')
-        
+
 
     def on_sort_added(self, action, params) -> None:
         """Callback when changing task sorting."""
-        
+
         self.get_pane().set_sorter('Added')
-        
+
 
     def on_sort_title(self, action, params) -> None:
         """Callback when changing task sorting."""
-        
+
         self.get_pane().set_sorter('Title')
-        
+
 
     def on_sort_modified(self, action, params) -> None:
         """Callback when changing task sorting."""
-        
+
         self.get_pane().set_sorter('Modified')
-        
+
 
     def on_sort_added(self, action, params) -> None:
         """Callback when changing task sorting."""
-        
+
         self.get_pane().set_sorter('Added')
-        
+
 
     def on_sort_tags(self, action, params) -> None:
         """Callback when changing task sorting."""
-        
+
         self.get_pane().set_sorter('Tags')
-        
+
 
     def close_all_task_editors(self, task_id):
         """ Including editors of subtasks """
@@ -1301,12 +1301,12 @@ def on_pane_switch(self, obj, pspec):
         #       so their subtasks "exist" when switching
         #       to actionable
         self.stack_switcher.get_stack().get_first_child().get_first_child().emit('expand-all')
-        
+
         self.get_pane().set_filter_tags(set(self.sidebar.selected_tags()))
         self.sidebar.change_pane(current_pane)
         self.get_pane().sort_btn.set_popover(None)
         self.get_pane().sort_btn.set_popover(self.sort_menu)
-        
+
         if search_query := self.search_entry.get_text():
             self.get_pane().set_search_query(search_query)
 
@@ -1358,24 +1358,24 @@ def get_selected_pane(self):
 
     def get_pane(self):
         """Get the selected pane."""
-        
+
         return self.stack_switcher.get_stack().get_visible_child().get_first_child()
- 
-    
+
+
     @GObject.Property(type=bool, default=True)
     def is_pane_open(self) -> bool:
         return self.get_selected_pane() == 'active'
-    
+
 
     @GObject.Property(type=bool, default=False)
     def is_pane_actionable(self) -> bool:
         return self.get_selected_pane() == 'workview'
-    
-    
+
+
     @GObject.Property(type=bool, default=False)
     def is_pane_closed(self) -> bool:
         return self.get_selected_pane() == 'closed'
-        
+
 
     def get_selected_tree(self, refresh: bool = False):
         return self.req.get_tasks_tree(name=self.get_selected_pane(),
diff --git a/GTG/gtk/browser/quick_add.py b/GTG/gtk/browser/quick_add.py
index c8bfa3f93d..b0c9c28ec9 100644
--- a/GTG/gtk/browser/quick_add.py
+++ b/GTG/gtk/browser/quick_add.py
@@ -113,4 +113,3 @@ def parse(text: str) -> Dict:
 
     result['title'] = text
     return result
-
diff --git a/GTG/gtk/browser/sidebar.py b/GTG/gtk/browser/sidebar.py
index 78c166a2cd..f987ffed04 100644
--- a/GTG/gtk/browser/sidebar.py
+++ b/GTG/gtk/browser/sidebar.py
@@ -45,14 +45,14 @@ class SearchBox(Gtk.Box):
 
 def unwrap(row, expected_type):
     """Find an item in TreeRow widget (sometimes nested)."""
-    
+
     item = row.get_item()
-    
+
     while type(item) is not expected_type:
         item = item.get_item()
 
     return item
-    
+
 
 # Shorthands
 BIND_FLAGS = GObject.BindingFlags.DEFAULT | GObject.BindingFlags.SYNC_CREATE
@@ -61,7 +61,7 @@ def unwrap(row, expected_type):
 
 class Sidebar(Gtk.ScrolledWindow):
     """The sidebar widget"""
-    
+
     def __init__(self, app, ds: Datastore, browser):
 
         super(Sidebar, self).__init__()
@@ -97,7 +97,7 @@ def __init__(self, app, ds: Datastore, browser):
 
         self.general_box.select_row(self.general_box.get_row_at_index(0))
         self.box_handle = self.general_box.connect('row-selected', self.on_general_box_selected)
-        
+
         # -------------------------------------------------------------------------------
         # Saved Searches Section
         # -------------------------------------------------------------------------------
@@ -144,7 +144,7 @@ def __init__(self, app, ds: Datastore, browser):
         self.filtered_tags = Gtk.FilterListModel()
         self.filtered_tags.set_model(ds.tags.tree_model)
         self.filtered_tags.set_filter(self.tags_filter)
-        
+
         self.tag_selection = Gtk.MultiSelection.new(self.filtered_tags)
         self.tag_handle = self.tag_selection.connect('selection-changed', self.on_tag_selected)
 
@@ -199,21 +199,21 @@ def __init__(self, app, ds: Datastore, browser):
 
     def refresh_tags(self) -> None:
         """Refresh tags list."""
-        
+
         self.filtered_tags.items_changed(0, 0, 0)
         self.tags_filter.changed(Gtk.FilterChange.DIFFERENT)
 
 
     def change_pane(self, pane: str) -> None:
         """Change pane for the tag list."""
-        
+
         self.tags_filter.pane = pane
         self.tags_filter.changed(Gtk.FilterChange.DIFFERENT)
-        
+
 
     def on_tag_RMB_click(self, gesture, sequence) -> None:
         """Callback when right-clicking on a tag."""
-        
+
         menu = TagContextMenu(self.ds, self.app, gesture.get_widget().tag)
         menu.set_parent(gesture.get_widget())
         menu.set_halign(Gtk.Align.START)
@@ -306,7 +306,7 @@ def tags_setup_cb(self, factory, listitem, user_data=None) -> None:
 
 
         # Drag ...
-        source = Gtk.DragSource() 
+        source = Gtk.DragSource()
         source.connect('prepare', self.prepare)
         source.connect('drag-begin', self.drag_begin)
         source.connect('drag-end', self.drag_end)
@@ -376,11 +376,11 @@ def tags_bind_cb(self, signallistitem, listitem, user_data=None) -> None:
             item.bind_property('task_count_actionable', actionable_count_label, 'label', BIND_FLAGS),
             item.bind_property('task_count_closed', closed_count_label, 'label', BIND_FLAGS),
         ]
-        
+
         self.browser.bind_property('is_pane_open', open_count_label, 'visible', BIND_FLAGS)
         self.browser.bind_property('is_pane_actionable', actionable_count_label, 'visible', BIND_FLAGS)
         self.browser.bind_property('is_pane_closed', closed_count_label, 'visible', BIND_FLAGS)
-        
+
 
         if item.parent:
             parent = item
@@ -404,11 +404,11 @@ def tags_unbind_cb(self, signallistitem, listitem, user_data=None) -> None:
         """Clean up bindings made in tags_bind_cb"""
         for binding in listitem.bindings:
             binding.unbind()
- 
+
 
     def unselect_tags(self) -> None:
         """Clear tags selection"""
-        
+
         with signal_block(self.tag_selection, self.tag_handle):
             self.tag_selection.unselect_all()
 
@@ -440,7 +440,7 @@ def on_general_box_selected(self, listbox, user_data=None):
             self.app.browser.get_pane().set_filter_tags()
         elif index == 1:
             self.app.browser.get_pane().set_filter_notags()
-            
+
 
     def on_search_selected(self, model, position, user_data=None):
         """Callback when selecting a saved search"""
@@ -459,15 +459,15 @@ def selected_tags(self, names_only: bool = False) -> list:
         selection = self.tag_selection.get_selection()
         result, iterator, _ = Gtk.BitsetIter.init_first(selection)
         selected = []
-        
+
         while iterator.is_valid():
             val = iterator.get_value()
             item = unwrap(self.tag_selection.get_item(val), Tag)
             selected.append(item.name if names_only else item)
             iterator.next()
-        
+
         return selected
-        
+
 
     def on_tag_selected(self, model, position, n_items, user_data=None):
         """Callback when selecting one or more tags"""
@@ -483,14 +483,14 @@ def on_tag_reveal(self, event) -> None:
         """Callback for clicking on the tags title button (revealer)."""
 
         self.revealer.set_reveal_child(not self.revealer.get_reveal_child())
-        
+
 
     def on_search_reveal(self, event) -> None:
         """Callback for clicking on the search title button (revealer)."""
 
         self.searches_revealer.set_reveal_child(not self.searches_revealer.get_reveal_child())
-        
-        
+
+
     def searches_setup_cb(self, factory, listitem, user_data=None) -> None:
         """Setup for a row in the saved searches listview"""
 
@@ -573,14 +573,14 @@ def drag_end(self, source, drag, unused):
 
     def check_parent(self, value, target) -> bool:
         """Check to parenting a parent to its own children"""
-        
+
         item = target
         while item.parent:
             if item.parent == value:
                 return False
-            
+
             item = item.parent
-        
+
         return True
 
 
@@ -593,12 +593,12 @@ def drag_drop(self, target, value, x, y):
 
         if value.parent:
             self.ds.tags.unparent(value.id, value.parent.id)
-        
+
         self.ds.tags.parent(value.id, dropped.id)
         self.ds.refresh_tag_stats()
         self.ds.tags.tree_model.emit('items-changed', 0, 0, 0)
         self.refresh_tags()
-        
+
 
 
     def drop_enter(self, target, x, y, user_data=None):
@@ -639,11 +639,11 @@ def multi_task_drag_drop(self, target, tasklist, x, y):
 
     def notify_task(self, task: Task) -> None:
         """Notify that tasks props have changed."""
-        
+
         task.notify('row_css')
         task.notify('icons')
         task.notify('tag_colors')
-        
+
 
     def on_toplevel_tag_drop(self, drop_target, tag, x, y):
         if tag.parent:
@@ -656,7 +656,7 @@ def on_toplevel_tag_drop(self, drop_target, tag, x, y):
                     expander.activate_action('listitem.toggle-expand')
             except RuntimeError:
                 pass
-                
+
             self.ds.tags.tree_model.emit('items-changed', 0, 0, 0)
             return True
         else:
diff --git a/GTG/gtk/browser/sidebar_context_menu.py b/GTG/gtk/browser/sidebar_context_menu.py
index c7f356a440..3e8289a62c 100644
--- a/GTG/gtk/browser/sidebar_context_menu.py
+++ b/GTG/gtk/browser/sidebar_context_menu.py
@@ -18,8 +18,8 @@
 
 """
 sidebar_context_menu:
-Implements a context (pop-up) menu for the tag or saved search item in the 
-sidebar. It is supposed to be a generic sidebar context for all kind of item 
+Implements a context (pop-up) menu for the tag or saved search item in the
+sidebar. It is supposed to be a generic sidebar context for all kind of item
 displayed there.
 Also, it is supposed to handle more complex menus (with non-std widgets,
 like a color picker).
@@ -44,7 +44,7 @@ def __init__(self, ds, app, tag):
         actions = [
             ("edit_tag", self.on_mi_cc_activate),
             ("generate_tag_color", self.on_mi_ctag_activate),
-            ("delete_tag", lambda w, a, p: 
+            ("delete_tag", lambda w, a, p:
             	self.app.browser.on_delete_tag_activate([self.tag]))
         ]
 
@@ -92,7 +92,7 @@ def __init__(self, ds, app, search):
 
         actions = [
             ("edit_search", lambda w, a, p: app.open_search_editor(search)),
-            ("delete_search", lambda w, a, p: 
+            ("delete_search", lambda w, a, p:
             	ds.saved_searches.remove(self.search.id))
         ]
 
diff --git a/GTG/gtk/browser/tag_editor.py b/GTG/gtk/browser/tag_editor.py
index 4cdd51bfcd..cc921ff742 100644
--- a/GTG/gtk/browser/tag_editor.py
+++ b/GTG/gtk/browser/tag_editor.py
@@ -245,7 +245,7 @@ def _apply(self):
 
             for t in self.app.ds.tasks.lookup.values():
                 t.rename_tag(self.tag.name, self.tag_name)
-                
+
             self.tag.name = self.tag_name
 
         self.app.ds.refresh_task_count()
@@ -274,7 +274,7 @@ def _random_color(self, widget: GObject.Object):
         c.red, c.green, c.blue, c.alpha = 1.0, 1.0, 1.0, 1.0
         c.parse('#' + color)
         self.tag_rgba = c
-        
+
     @Gtk.Template.Callback('activate_color')
     def _activate_color(self, widget: GObject.Object):
         """
diff --git a/GTG/gtk/browser/tag_pill.py b/GTG/gtk/browser/tag_pill.py
index d2bf752240..f786e5a225 100644
--- a/GTG/gtk/browser/tag_pill.py
+++ b/GTG/gtk/browser/tag_pill.py
@@ -23,9 +23,9 @@
 
 class TagPill(Gtk.DrawingArea):
     """Color pill widget for tags."""
-    
+
     __gtype_name__ = 'TagPill'
-    
+
     default_color = '#666666'
 
     def __init__(self, radius: int = 5):
@@ -53,7 +53,7 @@ def set_colors(self, value) -> None:
             for color in value.split(','):
                 rgba = Gdk.RGBA()
                 valid = rgba.parse(color)
-                
+
                 if valid:
                     self.colors.append(rgba)
                 else:
@@ -68,13 +68,13 @@ def set_colors(self, value) -> None:
         self.queue_draw()
 
 
-    def draw_rect(self, context, x: int, w: int, h: int, 
+    def draw_rect(self, context, x: int, w: int, h: int,
                   color: Gdk.RGBA = None) -> None:
         """Draw a single color rectangle."""
-        
+
         y = 0   # No change in Y axis
         r = self.radius
-        
+
         if color:
             context.set_source_rgba(color.red, color.green, color.blue)
 
@@ -117,7 +117,7 @@ def draw_rect(self, context, x: int, w: int, h: int,
 
     def do_draw_function(self, area, context, w, h, user_data=None):
         """Drawing callback."""
-        
+
         for i, color in enumerate(self.colors):
             x = i * (16 + 6)
             self.draw_rect(context, x, 16, h, color)
diff --git a/GTG/gtk/browser/task_pane.py b/GTG/gtk/browser/task_pane.py
index 25d436b09d..2108bf7fc0 100644
--- a/GTG/gtk/browser/task_pane.py
+++ b/GTG/gtk/browser/task_pane.py
@@ -41,7 +41,7 @@ def __init__(self, config, is_actionable=False):
         self.expander.set_margin_end(6)
         self.expander.add_css_class('arrow-only-expander')
 
-        self.check = Gtk.CheckButton() 
+        self.check = Gtk.CheckButton()
         self.check.set_margin_end(6)
 
         self.append(self.expander)
@@ -64,7 +64,7 @@ def set_has_children(self, value) -> bool:
         self.expander.set_visible(value)
 
         if value:
-            widget = self.expander 
+            widget = self.expander
         else:
             widget = self.check
 
@@ -84,7 +84,7 @@ def set_has_children(self, value) -> bool:
             widget.set_margin_start(indent + (21 * depth))
         else:
             widget.set_margin_start(indent)
-        
+
 
     @GObject.Property(type=bool, default=True)
     def is_active(self) -> None:
@@ -97,7 +97,7 @@ def set_is_active(self, value) -> bool:
             self.remove_css_class('closed-task')
         else:
             self.add_css_class('closed-task')
-    
+
 
     @GObject.Property(type=str)
     def row_css(self) -> None:
@@ -115,7 +115,7 @@ def set_row_css(self, value) -> None:
                 return
             except AttributeError:
                 return
-                
+
         val = str.encode(value)
 
         self.provider = Gtk.CssProvider()
@@ -125,9 +125,9 @@ def set_row_css(self, value) -> None:
 
 def unwrap(row, expected_type):
     """Find an item in TreeRow widget (sometimes nested)."""
-    
+
     item = row.get_item()
-    
+
     while type(item) is not expected_type:
         item = item.get_item()
 
@@ -136,7 +136,7 @@ def unwrap(row, expected_type):
 
 class TaskPane(Gtk.ScrolledWindow):
     """The task pane widget"""
-    
+
     def __init__(self, browser, pane):
 
         super(TaskPane, self).__init__()
@@ -148,7 +148,7 @@ def __init__(self, browser, pane):
 
         self.set_vexpand(True)
         self.set_hexpand(True)
-        
+
         # -------------------------------------------------------------------------------
         # Title
         # -------------------------------------------------------------------------------
@@ -159,17 +159,17 @@ def __init__(self, browser, pane):
         title_box.set_margin_bottom(32)
         title_box.set_margin_start(24)
         title_box.set_margin_end(24)
-        
+
         self.title = Gtk.Label()
         self.title.set_halign(Gtk.Align.START)
         self.title.set_hexpand(True)
         self.title.add_css_class('title-1')
         title_box.append(self.title)
-        
+
         self.sort_btn = Gtk.MenuButton()
         self.sort_btn.set_icon_name('view-more-symbolic')
         self.sort_btn.add_css_class('flat')
-        
+
         title_box.append(self.sort_btn)
 
 
@@ -178,14 +178,14 @@ def __init__(self, browser, pane):
         # -------------------------------------------------------------------------------
 
         self.search_filter = SearchTaskFilter(self.ds, pane)
-        self.task_filter = TaskPaneFilter(self.app.ds, pane) 
+        self.task_filter = TaskPaneFilter(self.app.ds, pane)
 
         self.filtered = Gtk.FilterListModel()
         self.filtered.set_model(self.app.ds.tasks.tree_model)
         self.filtered.set_filter(self.task_filter)
 
         self.sort_model = Gtk.TreeListRowSorter()
-        
+
         self.main_sorter = Gtk.SortListModel()
         self.main_sorter.set_model(self.filtered)
         self.main_sorter.set_sorter(self.sort_model)
@@ -234,7 +234,7 @@ def set_title(self) -> None:
                self.title.set_text(_('Actionable Tasks'))
            if self.pane == 'closed':
                self.title.set_text(_('All Closed Tasks'))
-               
+
         else:
            tags = ', '.join('@' + t.name for t in self.task_filter.tags)
 
@@ -244,7 +244,7 @@ def set_title(self) -> None:
                self.title.set_text(_('{0} (Actionable)'.format(tags)))
            if self.pane == 'closed':
                self.title.set_text(_('{0} (Closed)'.format(tags)))
-            
+
 
     def set_search_query(self, query) -> None:
         """Change tasks filter."""
@@ -299,7 +299,7 @@ def set_filter_notags(self, tags=[]) -> None:
 
     def refresh(self):
         """Refresh the task filter"""
-        
+
         self.task_filter.changed(Gtk.FilterChange.DIFFERENT)
         self.main_sorter.items_changed(0,0,0)
 
@@ -327,13 +327,13 @@ def set_sorter(self, method=None) -> None:
 
     def on_listview_activated(self, listview, position, user_data = None):
         """Callback when double clicking on a row."""
-        
+
         self.app.browser.on_edit_active_task()
 
 
     def on_key_released(self, controller, keyval, keycode, state):
         """Callback when a key is released. """
-        
+
         is_enter = keyval in (Gdk.KEY_Return, Gdk.KEY_KP_Enter)
         is_left = keyval == Gdk.KEY_Left
         is_right = keyval == Gdk.KEY_Right
@@ -348,14 +348,14 @@ def on_key_released(self, controller, keyval, keycode, state):
 
     def select_last(self) -> None:
         """Select last position in the task list."""
-        
+
         position = self.app.ds.tasks.tree_model.get_n_items()
         self.task_selection.select_item(position - 1, True)
-        
+
 
     def select_task(self, task: Task) -> None:
         """Select a task in the list."""
-        
+
         position = None
 
         for i in range(self.main_sorter.get_n_items()):
@@ -375,7 +375,7 @@ def get_selection(self, indices: bool = False) -> list:
         selection = self.task_selection.get_selection()
         result, iterator, _ = Gtk.BitsetIter.init_first(selection)
         selected = []
-        
+
         while iterator.is_valid():
             val = iterator.get_value()
 
@@ -383,7 +383,7 @@ def get_selection(self, indices: bool = False) -> list:
                 selected.append(val)
             else:
                 selected.append(unwrap(self.task_selection.get_item(val), Task))
-                
+
             iterator.next()
 
         return selected
@@ -394,12 +394,12 @@ def expand_selected(self, expand) -> None:
 
         selection = self.task_selection.get_selection()
         result, iterator, _ = Gtk.BitsetIter.init_first(selection)
-        
+
         while iterator.is_valid():
             val = iterator.get_value()
             row = self.task_selection.get_item(val)
             row.set_expanded(expand)
-                
+
             iterator.next()
 
 
@@ -412,12 +412,12 @@ def get_selected_number(self) -> int:
 
     def on_checkbox_toggled(self, button, task=None):
         """Callback when clicking a checkbox."""
-        
+
         if task.status == Status.DISMISSED:
             task.toggle_dismiss()
         else:
             task.toggle_active()
-        
+
         task.notify('is_active')
         self.task_filter.changed(Gtk.FilterChange.DIFFERENT)
 
@@ -426,18 +426,18 @@ def task_setup_cb(self, factory, listitem, user_data=None):
         """Setup widgets for rows"""
 
         box = TaskBox(self.app.config, self.pane == 'workview')
-        label = Gtk.Label() 
-        separator = Gtk.Separator() 
-        icons = Gtk.Label() 
+        label = Gtk.Label()
+        separator = Gtk.Separator()
+        icons = Gtk.Label()
         color = TagPill()
-        due = Gtk.Label() 
-        due_icon = Gtk.Image.new_from_icon_name('alarm-symbolic') 
-        start = Gtk.Label() 
-        start_icon = Gtk.Image.new_from_icon_name('media-playback-start-symbolic') 
-        recurring_icon = Gtk.Label() 
+        due = Gtk.Label()
+        due_icon = Gtk.Image.new_from_icon_name('alarm-symbolic')
+        start = Gtk.Label()
+        start_icon = Gtk.Image.new_from_icon_name('media-playback-start-symbolic')
+        recurring_icon = Gtk.Label()
 
         color.set_size_request(16, 16)
-        
+
         color.set_vexpand(False)
         color.set_valign(Gtk.Align.CENTER)
 
@@ -471,7 +471,7 @@ def on_notify_visibility(obj, gparamstring):
         start.set_margin_end(12)
 
         # DnD stuff
-        source = Gtk.DragSource() 
+        source = Gtk.DragSource()
         source.connect('prepare', self.drag_prepare)
         source.connect('drag-begin', self.drag_begin)
         source.connect('drag-end', self.drag_end)
@@ -572,7 +572,7 @@ def drag_prepare(self, source, x, y):
         """Callback to prepare for the DnD operation"""
 
         selection = self.get_selection()
-        
+
         if len(selection) > 1:
             data = Gio.ListStore()
             data.splice(0, 0, selection)
@@ -626,14 +626,14 @@ def drop_enter(self, target, x, y, user_data=None):
 
     def check_parent(self, value, target) -> bool:
         """Check to parenting a parent to its own children"""
-        
+
         item = target
         while item.parent:
             if item.parent == value:
                 return False
-            
+
             item = item.parent
-        
+
         return True
 
 
@@ -647,7 +647,7 @@ def drag_drop(self, target, task, x, y):
 
         if task.parent:
             self.ds.tasks.unparent(task.id, task.parent.id)
-        
+
         self.ds.tasks.parent(task.id, dropped.id)
         self.refresh()
         self.emit('collapse-all')
@@ -657,7 +657,7 @@ def drag_drop(self, target, task, x, y):
     def on_task_RMB_click(self, gesture, sequence) -> None:
         """Callback when right-clicking on an open task."""
 
-        widget = gesture.get_widget() 
+        widget = gesture.get_widget()
         task = widget.task
 
         if self.get_selected_number() <= 1:
@@ -674,7 +674,7 @@ def on_task_RMB_click(self, gesture, sequence) -> None:
         rect = Gdk.Rectangle()
         rect.x = x
         rect.y = y
-        
+
         menu.set_pointing_to(rect)
         menu.popup()
 
diff --git a/GTG/gtk/data/main_window.ui b/GTG/gtk/data/main_window.ui
index b12dbd511b..251b8a0b08 100644
--- a/GTG/gtk/data/main_window.ui
+++ b/GTG/gtk/data/main_window.ui
@@ -221,7 +221,7 @@
       <attribute name="label" translatable="yes">Sort by Modified Date</attribute>
       <attribute name="action">win.sort_by_modified</attribute>
     </item>
-    
+
     <item>
       <attribute name="label" translatable="yes">Sort by Tags</attribute>
       <attribute name="action">win.sort_by_tags</attribute>
diff --git a/GTG/gtk/data/style.css b/GTG/gtk/data/style.css
index 951c688ba3..a6101f1f4a 100644
--- a/GTG/gtk/data/style.css
+++ b/GTG/gtk/data/style.css
@@ -10,8 +10,8 @@
     border-top: 1px solid rgb(213, 208, 204);
 }
 
-/* 
-    We have to get move the padding into the boxes 
+/*
+    We have to get move the padding into the boxes
     so the background color of the rows reaches all
     the way to the edges
 */
@@ -21,7 +21,7 @@
 
 .task-list row > box {
     padding: 15px 16px;
-} 
+}
 
 /* --------------------------------------------------------------------------------
  * ERROR HANDLER
@@ -87,10 +87,10 @@ textview check {
 .hide { opacity: 0.2; }
 
 .color-pill {
-    background: #999; 
-    padding: 0; 
-    min-height: 16px; 
-    min-width: 16px; 
+    background: #999;
+    padding: 0;
+    min-height: 16px;
+    min-width: 16px;
     border: none;
 }
 
@@ -104,4 +104,4 @@ textview check {
 
 .closed-task {
     opacity: 0.5;
-}
\ No newline at end of file
+}
diff --git a/GTG/gtk/editor/editor.py b/GTG/gtk/editor/editor.py
index 87092c969a..bb19ddf23a 100644
--- a/GTG/gtk/editor/editor.py
+++ b/GTG/gtk/editor/editor.py
@@ -301,7 +301,7 @@ def sync_tag_store(self, widget=None):
 
         self.tag_store.clear()
         used = set()
-        
+
         for used_tag in self.task.tags:
             # First parameter marks the tag as used
             self.tag_store.append((True, used_tag.name))
@@ -310,7 +310,7 @@ def sync_tag_store(self, widget=None):
         for tag_name in self.ds.tags.lookup_names.keys():
             if tag_name not in used:
                 self.tag_store.append((False, tag_name))
-            
+
 
     def sync_repeat_button(self, object=None, pspec=None):
         if self.recurring_menu.is_task_recurring:
@@ -568,7 +568,7 @@ def reload_editor(self):
         textview = self.textview
         task_text = task.content
         task_title = task.title
-        
+
         textview.set_text(f"{task_title}\n")
 
         if task_text:
@@ -709,7 +709,7 @@ def open_subtask(self, tid):
 
         task = self.ds.tasks.lookup[tid]
         self.app.open_task(task)
-        
+
         if task.parent:
             self.app.close_task(task.parent.id)
 
@@ -718,19 +718,19 @@ def new_subtask(self, title=None, tid=None):
             self.app.ds.tasks.parent(self.task.id, tid)
 
             return self.app.ds.tasks.lookup[tid]
-        
+
         elif title and not tid:
             t = self.app.ds.tasks.new(title, self.task.id)
             tid = t.id
             self.app.ds.tasks.refresh_lookup_cache()
 
             return t
-        
+
         elif title and tid:
             t = self.app.ds.tasks.new(title, self.task.id)
             t.id = tid
             self.app.ds.tasks.refresh_lookup_cache()
-            
+
             return t
 
     def remove_subtask(self, tid):
@@ -875,7 +875,7 @@ def close(self, action=None, param=None):
 
 
     def is_new(self) -> bool:
-        return (self.task.title == DEFAULT_TITLE 
+        return (self.task.title == DEFAULT_TITLE
                 and self.textview.get_text() == '')
 
 
diff --git a/GTG/gtk/editor/taskview.py b/GTG/gtk/editor/taskview.py
index a1574739b5..23dfb3f279 100644
--- a/GTG/gtk/editor/taskview.py
+++ b/GTG/gtk/editor/taskview.py
@@ -239,7 +239,7 @@ def process(self,mask_current_word:bool=False) -> None:
                 cur_pos = cursor_iter.get_line_offset()
                 text = TaskView.mask_current_word(text,cur_pos)
 
-            self.detect_tag(text, start) 
+            self.detect_tag(text, start)
 
             start.forward_line()
 
diff --git a/GTG/gtk/errorhandler.py b/GTG/gtk/errorhandler.py
index 3d837cd9f3..7afa18df30 100644
--- a/GTG/gtk/errorhandler.py
+++ b/GTG/gtk/errorhandler.py
@@ -268,4 +268,3 @@ def restore_excepthook() -> bool:
         return False
     sys.excepthook = original_excepthook
     original_excepthook = None
-
diff --git a/GTG/gtk/general_preferences.py b/GTG/gtk/general_preferences.py
index d6e06e6f36..6b26a5e3a0 100644
--- a/GTG/gtk/general_preferences.py
+++ b/GTG/gtk/general_preferences.py
@@ -178,4 +178,4 @@ def on_dark_mode_toggled(self, widget, state):
         """Toggle darkmode."""
 
         self.config.set("dark_mode", state)
-        self.app.toggle_darkmode(state)
\ No newline at end of file
+        self.app.toggle_darkmode(state)
diff --git a/GTG/gtk/tag_completion.py b/GTG/gtk/tag_completion.py
index febe71c561..f9ee28cfb0 100644
--- a/GTG/gtk/tag_completion.py
+++ b/GTG/gtk/tag_completion.py
@@ -111,7 +111,7 @@ def _on_tag_added(self, tag):
 
     def _try_delete(self, name):
         """ Delete an item if it is in the list """
-        
+
         for row in self.tags:
             if row[0] == name:
                 self.tags.remove(row.iter)
diff --git a/GTG/plugins/export/export_templates/template_pocketmod.tex b/GTG/plugins/export/export_templates/template_pocketmod.tex
index 592c323027..9d88ac80a4 100644
--- a/GTG/plugins/export/export_templates/template_pocketmod.tex
+++ b/GTG/plugins/export/export_templates/template_pocketmod.tex
@@ -28,7 +28,7 @@
 	#end if
 
 	#if $task.has_due_date
-		\textit{Due: $task.due_date}\\ 
+		\textit{Due: $task.due_date}\\
 	#end if
 
 	#if $task.has_subtasks
diff --git a/GTG/plugins/export/export_templates/template_sexy.html b/GTG/plugins/export/export_templates/template_sexy.html
index 97e53d8ae8..2d11c35a6b 100644
--- a/GTG/plugins/export/export_templates/template_sexy.html
+++ b/GTG/plugins/export/export_templates/template_sexy.html
@@ -31,12 +31,12 @@
 
 <!--
 So you want to write your own template for Getting things GNOME?
-Cool. Now, these templates are interpreted with a python library 
+Cool. Now, these templates are interpreted with a python library
 called Cheetah. If you know a little about python or some other
 scripting languare, just dive in, it's really straightforward.
-A little note: #slurp is used to avoid the trailing newline addition, 
+A little note: #slurp is used to avoid the trailing newline addition,
 like echo -n if you are into CLIs.
-Otherwise, a nice and easy tutorial about it can be found 
+Otherwise, a nice and easy tutorial about it can be found
 here:
 http://www.devshed.com/c/a/Python/Templating-with-Cheetah/
 
@@ -66,7 +66,7 @@
 
 ## Remember to put a $ before any varible (e.g.: $tasks), I won't do
 ## it here so that it shows up in the source of the generated html
-## (the ## are the comment escaping in Cheetah, so these line won't 
+## (the ## are the comment escaping in Cheetah, so these line won't
 ## show up)
 
 If you write down a nice template, please send it back to the GTG project:
@@ -217,9 +217,9 @@ <h3>Tags Key</h3>
 or look at http://live.gnome.org/gtg/pluginHowTo  (you are only interested
 in the "Plugin API" part of that page, so scroll down).
 
-An example of usage of that is given in the following lines, that list 
+An example of usage of that is given in the following lines, that list
 all GTG's tags.
-To see this code working, delete the "##" at the beginning of each line 
+To see this code working, delete the "##" at the beginning of each line
 and take it out of the html comment
 
 
@@ -232,4 +232,3 @@ <h3>Tags Key</h3>
 
     </body>
 </html>
-
diff --git a/GTG/plugins/export/export_templates/template_simple.html b/GTG/plugins/export/export_templates/template_simple.html
index dfc6e09c27..6f85016b7f 100644
--- a/GTG/plugins/export/export_templates/template_simple.html
+++ b/GTG/plugins/export/export_templates/template_simple.html
@@ -24,12 +24,12 @@
 
 <!--
 So you want to write your own template for Getting things GNOME?
-Cool. Now, these templates are interpreted with a python library 
+Cool. Now, these templates are interpreted with a python library
 called Cheetah. If you know a little about python or some other
 scripting languare, just dive in, it's really straightforward.
-A little note: #slurp is used to avoid the trailing newline addition, 
+A little note: #slurp is used to avoid the trailing newline addition,
 like echo -n if you are into CLIs.
-Otherwise, a nice and easy tutorial about it can be found 
+Otherwise, a nice and easy tutorial about it can be found
 here:
 http://www.devshed.com/c/a/Python/Templating-with-Cheetah/
 
@@ -59,7 +59,7 @@
 
 ## Remember to put a $ before any varible (e.g.: $tasks), I won't do
 ## it here so that it shows up in the source of the generated html
-## (the ## are the comment escaping in Cheetah, so these line won't 
+## (the ## are the comment escaping in Cheetah, so these line won't
 ## show up)
 
 If you write down a nice template, please send it back to the GTG project:
@@ -95,9 +95,9 @@
             <li>
 
                 #if $task.has_title
-                <b>$task.title</b> 
+                <b>$task.title</b>
                     #if $task.has_tags
-                    (#slurp 
+                    (#slurp
                         #for $tag in $task.tags:
                             $get_colored_tag_markup($plugin_api.get_requester(), $tag, True) #slurp
                         #end for
@@ -114,7 +114,7 @@
                 $remove_html_tags($task.text)
                 #end if
 
-                
+
                 #if $task.has_subtasks
                 <ul>
                     #for $subtask in $task.subtasks:
@@ -152,9 +152,9 @@
 or look at http://live.gnome.org/gtg/pluginHowTo  (you are only interested
 in the "Plugin API" part of that page, so scroll down).
 
-An example of usage of that is given in the following lines, that list 
+An example of usage of that is given in the following lines, that list
 all GTG's tags.
-To see this code working, delete the "##" at the beginning of each line 
+To see this code working, delete the "##" at the beginning of each line
 and take it out of the html comment
 
 
@@ -167,4 +167,3 @@
 
     </body>
 </html>
-
diff --git a/GTG/plugins/unmaintained/README.txt b/GTG/plugins/unmaintained/README.txt
index 7494c4eb86..c18c52c888 100644
--- a/GTG/plugins/unmaintained/README.txt
+++ b/GTG/plugins/unmaintained/README.txt
@@ -5,7 +5,7 @@ up to fix and support them.
 If you are interested in taking over one of these, let us know in the bug
 tracker!
 
---- 
+---
 
 "Bugzilla" plugin dependencies:
   * python3-bugz
@@ -18,4 +18,3 @@ which supports indicators:
 
 "Tomboy/Gnote" plugin needs a running instance of Tomboy or Gnote.
   * python3-dbus
-
diff --git a/GTG/plugins/unmaintained/geolocalized_tasks/geolocalized.ui b/GTG/plugins/unmaintained/geolocalized_tasks/geolocalized.ui
index 1066d9a7b7..b0c6f111fe 100644
--- a/GTG/plugins/unmaintained/geolocalized_tasks/geolocalized.ui
+++ b/GTG/plugins/unmaintained/geolocalized_tasks/geolocalized.ui
@@ -438,7 +438,7 @@
                         <property name="visible">True</property>
                         <property name="margin-start">4</property>
                         <property name="margin-end">4</property>
-                        <property name="label" translatable="yes">&lt;small&gt;Distance in kilometers from 
+                        <property name="label" translatable="yes">&lt;small&gt;Distance in kilometers from
                           the current location.&lt;/small&gt;</property>
                           <property name="use_markup">True</property>
                         </object>
diff --git a/GTG/plugins/unmaintained/geolocalized_tasks/icons/hicolor/svg/assign-location.svg b/GTG/plugins/unmaintained/geolocalized_tasks/icons/hicolor/svg/assign-location.svg
index 991eecb16c..e532f5d3bf 100644
--- a/GTG/plugins/unmaintained/geolocalized_tasks/icons/hicolor/svg/assign-location.svg
+++ b/GTG/plugins/unmaintained/geolocalized_tasks/icons/hicolor/svg/assign-location.svg
@@ -54,4 +54,4 @@
     </g>
     <rect style="overflow: visible; marker: none; opacity: 0.350962; fill: none; fill-opacity: 1; fill-rule: nonzero; stroke: rgb(255, 255, 255); stroke-width: 1px; stroke-linecap: butt; stroke-linejoin: miter; stroke-miterlimit: 4; stroke-dasharray: none; stroke-dashoffset: 0pt; stroke-opacity: 1; visibility: visible; display: inline;" id="rect8093" width="13.000001" height="13.053962" x="1.5" y="1.5" rx="1.2367706" ry="1.2367706"/>
   </g>
-</svg>
\ No newline at end of file
+</svg>
diff --git a/GTG/plugins/unmaintained/geolocalized_tasks/icons/hicolor/svg/geolocalization.svg b/GTG/plugins/unmaintained/geolocalized_tasks/icons/hicolor/svg/geolocalization.svg
index 4bd67028a4..3c1d672d6e 100644
--- a/GTG/plugins/unmaintained/geolocalized_tasks/icons/hicolor/svg/geolocalization.svg
+++ b/GTG/plugins/unmaintained/geolocalized_tasks/icons/hicolor/svg/geolocalization.svg
@@ -98,4 +98,4 @@
     <rect style="overflow: visible; marker: none; fill: rgb(255, 253, 236); fill-opacity: 1; fill-rule: nonzero; stroke: none; stroke-width: 1px; stroke-linecap: butt; stroke-linejoin: miter; stroke-miterlimit: 4; stroke-dasharray: none; stroke-dashoffset: 0pt; stroke-opacity: 1; visibility: visible; display: inline;" id="rect7866" width="1" height="8" x="8" y="7"/>
     <rect style="overflow: visible; marker: none; fill: rgb(255, 253, 236); fill-opacity: 1; fill-rule: nonzero; stroke: none; stroke-width: 1px; stroke-linecap: butt; stroke-linejoin: miter; stroke-miterlimit: 4; stroke-dasharray: none; stroke-dashoffset: 0pt; stroke-opacity: 1; visibility: visible; display: inline;" id="rect7490" width="6" height="1" x="5" y="13"/>
   </g>
-</svg>
\ No newline at end of file
+</svg>
diff --git a/GTG/plugins/unmaintained/notification_area/notification_area.ui b/GTG/plugins/unmaintained/notification_area/notification_area.ui
index 7d6ededb05..0ac2850b7c 100644
--- a/GTG/plugins/unmaintained/notification_area/notification_area.ui
+++ b/GTG/plugins/unmaintained/notification_area/notification_area.ui
@@ -89,7 +89,7 @@
                 <property name="visible">True</property>
                 <property name="can_focus">False</property>
                 <property name="has_tooltip">True</property>
-                <property name="tooltip_text" translatable="yes">The icon in the notification area is colored if there are tasks in the danger zone. 
+                <property name="tooltip_text" translatable="yes">The icon in the notification area is colored if there are tasks in the danger zone.
 A danger zone of 0 disables icon coloring.</property>
                 <property name="margin-start">4</property>
                 <property name="margin-end">4</property>
diff --git a/NEWS b/NEWS
index 14c8aa647e..930d300468 100644
--- a/NEWS
+++ b/NEWS
@@ -3,16 +3,16 @@ Version 0.6
 ===========
 
 GTG 0.6 brings even more performance improvements, bug fixes,
-the introduction of the CalDAV synchronization service, 
-the new Gamify plugin, and a redesign of the Tag Editor. 
+the introduction of the CalDAV synchronization service,
+the new Gamify plugin, and a redesign of the Tag Editor.
 
 New Features:
 
  • A new CalDAV backend is available, and the backends dialog is available again.
-   CalDAV is a calendaring protocol that allows a client to access items 
-   from a server. GTG now provides support for this standard, and with this new sync 
+   CalDAV is a calendaring protocol that allows a client to access items
+   from a server. GTG now provides support for this standard, and with this new sync
    service, you can manage all your tasks in one place.
- • The new Gamify plugin adds a game aspect to your GTG workflow, 
+ • The new Gamify plugin adds a game aspect to your GTG workflow,
    such as the ability to set task targets and task completion streaks.
  • The Tag Editor was completely redesigned.
  • Added support for undo/redo actions in the Task Editor.
@@ -21,7 +21,7 @@ New Features:
  • ESC now closes the calendar picker window.
  • Added the CTRL+B shortcut to set focus on the sidebar.
  • Added an option to set the due date to "today" in the context menu.
- • The "Mark as not done" and "Undismiss" actions were replaced by a unified 
+ • The "Mark as not done" and "Undismiss" actions were replaced by a unified
    "Reopen" action for closed tasks in the right-click context menu.
  • The "Start Tomorrow" button is now adaptive, so that the main window
    can be resized to smaller widths.
@@ -29,9 +29,9 @@ New Features:
    both weekday names and the offset number of days from today.
    It also allows easily deferring to 7 days instead of only 6 days,
    and the ordering of this menubutton matches better with other menus.
- 
+
  Backend, Code Quality, and Performance Improvements:
- 
+
  • Reintroduced the global exception/traceback catcher,
    with a dialog showing up when an error occurs.
  • Made an improvement to avoid infinite loops when entering invalid dates
@@ -40,7 +40,7 @@ New Features:
  • Removed some deprecation warnings.
  • Added StartupWMClass to make pinning on KDE work.
  • Used application ID as the window icon (so KDE shows the correct icon).
- • Made several changes in preparation for Gtk 4.0, as well as updated 
+ • Made several changes in preparation for Gtk 4.0, as well as updated
    a number of deprecated GTK-related items.
  • Made a ton of PEP8 and style fixes.
  • Refactored the date class.
@@ -52,35 +52,35 @@ New Features:
 
 Bug Fixes:
 
- • Fixed possible crash when trying to create parent task, and similar operations, 
+ • Fixed possible crash when trying to create parent task, and similar operations,
    when the "Open" tab has not been opened yet (maximum recursion depth error).
- • Made a change to save a task before creating a parent. 
-   This prevents an error that appeared when a task title would be reset 
+ • Made a change to save a task before creating a parent.
+   This prevents an error that appeared when a task title would be reset
    after adding a parent.
  • Fixed an issue where tags were being duplicated.
- • Fixed an issue where tags and saved searches with the same name were 
+ • Fixed an issue where tags and saved searches with the same name were
     being considered duplicates.
- • Fixed a bug where every editor window would come back if GTG wasn’t 
+ • Fixed a bug where every editor window would come back if GTG wasn’t
     closed cleanly (i.e., shut down).
  • Made several fixes for scripts.
  • Fixed certain main menu entries not being selectable via the keyboard.
  • Fixed the cut-off when you expand the columns too much.
- • Fixed a regression where symbols in tags (e.g., dashes and dots) were not 
+ • Fixed a regression where symbols in tags (e.g., dashes and dots) were not
    recognized by the Task Editor. Also, added support for a few more.
  • Fixed a bug where tags' icon, parent, and color were not being removed in the XML file.
- • Fixed a bug that occured when GTG just starts up with no tasks selected, 
+ • Fixed a bug that occured when GTG just starts up with no tasks selected,
    and the user tried to use the "Add Parent" hotkey.
-  
+
 Documentation Updates:
 
- • Added documentation to the Contributor Docs for contributing to the User Manual 
+ • Added documentation to the Contributor Docs for contributing to the User Manual
    (i.e., for writing help files).
- • Added information about using flamegraph for profiling GTG for 
+ • Added information about using flamegraph for profiling GTG for
    performance documentation (in the Contributor Docs).
  • Updated the user manual for this release.
 
 For details on all of these new features, improvements, and fixes,
-see the release's milestone: https://github.com/getting-things-gnome/gtg/milestone/4. 
+see the release's milestone: https://github.com/getting-things-gnome/gtg/milestone/4.
 
 ===========
 Version 0.5
diff --git a/build-aux/requirements.txt b/build-aux/requirements.txt
index 350823c84a..23a36f9b63 100644
--- a/build-aux/requirements.txt
+++ b/build-aux/requirements.txt
@@ -3,4 +3,4 @@ caldav==1.3.9
 git+https://github.com/getting-things-gnome/liblarch.git#egg=liblarch
 pytest
 Cheetah3
-dbus-python==1.2.18
\ No newline at end of file
+dbus-python==1.2.18
diff --git a/data/test-data/bryce/xdg/data/gtg/gtg_tasks.xml b/data/test-data/bryce/xdg/data/gtg/gtg_tasks.xml
index 24937e21ac..b40e97270b 100644
--- a/data/test-data/bryce/xdg/data/gtg/gtg_tasks.xml
+++ b/data/test-data/bryce/xdg/data/gtg/gtg_tasks.xml
@@ -22799,4 +22799,3 @@ mmmmmm mm mm mmmmmmmmmmmmmmm mmm mm mmmmmmmmmm mmmm mmm mmmmm mmmmmm mm mmmm mmm
 		<modified>2010-06-15T09:04:12</modified>
 	</task>
 </project>
-
diff --git a/data/test-data/screenshots/xdg/config/gtg/gtg.conf b/data/test-data/screenshots/xdg/config/gtg/gtg.conf
index 525d6edb3b..815af8a34a 100644
--- a/data/test-data/screenshots/xdg/config/gtg/gtg.conf
+++ b/data/test-data/screenshots/xdg/config/gtg/gtg.conf
@@ -1,7 +1,7 @@
 [browser]
 x_pos = 1713
 height = 948
-opened_tasks = 
+opened_tasks =
 ctask_pane_height = 402
 tag_pane = True
 closed_task_pane = True
@@ -21,8 +21,7 @@ contents_preview_enable = True
 
 [plugins]
 disabled = send_email,untouched_tasks,urgency_color,export
-enabled = 
+enabled =
 
 [tag_editor]
 custom_colors = #3D3BB4,#F9BED8,#FFCC1A
-
diff --git a/data/test-data/screenshots/xdg/config/gtg/tasks.conf b/data/test-data/screenshots/xdg/config/gtg/tasks.conf
index b7d6822465..1109b39960 100644
--- a/data/test-data/screenshots/xdg/config/gtg/tasks.conf
+++ b/data/test-data/screenshots/xdg/config/gtg/tasks.conf
@@ -225,4 +225,3 @@ size = 588,400
 [9233b86b-5212-4ebc-aa15-85a97a7fecd0]
 position = 2111,1167
 size = 588,400
-
diff --git a/data/test-data/screenshots/xdg/data/gtg/gtg_tasks.xml b/data/test-data/screenshots/xdg/data/gtg/gtg_tasks.xml
index 3714641a3c..b34fef5375 100644
--- a/data/test-data/screenshots/xdg/data/gtg/gtg_tasks.xml
+++ b/data/test-data/screenshots/xdg/data/gtg/gtg_tasks.xml
@@ -20,7 +20,7 @@ Define what new GTG functionalities we will envision for 0.3 and decide what oth
 		<addeddate>2020-06-04T23:55:23</addeddate>
 		<modified>2020-06-05T01:32:01</modified>
 		<subtask>3@1</subtask>
-		<content>&lt;tag&gt;@GTG&lt;/tag&gt;, open-source, 
+		<content>&lt;tag&gt;@GTG&lt;/tag&gt;, open-source,
 
 * tag edition dialog
 * printing
@@ -47,7 +47,7 @@ Define what new GTG functionalities we will envision for 0.3 and decide what oth
 		<addeddate>2020-06-04T23:55:23</addeddate>
 		<modified>2020-06-05T09:39:58</modified>
 		<subtask>9@1</subtask>
-		<content>&lt;tag&gt;@GTG&lt;/tag&gt;, 
+		<content>&lt;tag&gt;@GTG&lt;/tag&gt;,
 There used to be a GTG website but it died in an untimely accident. We could consider putting together a new, better-looking website to promote GTG
  &lt;subtask&gt;9@1&lt;/subtask&gt;</content>
 		<task-remote-ids/>
@@ -162,7 +162,7 @@ create some simple and yet nice style for the website
 		<title>Plan the next year and allocate some vacation time</title>
 		<addeddate>2020-06-04T23:33:13</addeddate>
 		<modified>2020-06-05T11:37:38</modified>
-		<content>&lt;tag&gt;@travels&lt;/tag&gt;, &lt;tag&gt;@fun&lt;/tag&gt;, 
+		<content>&lt;tag&gt;@travels&lt;/tag&gt;, &lt;tag&gt;@fun&lt;/tag&gt;,
 
 Have a look at the calendar, to spot where I could have some time to go on holiday</content>
 		<task-remote-ids/>
@@ -262,7 +262,7 @@ Have a look at the calendar, to spot where I could have some time to go on holid
 		<addeddate>2020-06-04T23:44:57</addeddate>
 		<modified>2020-06-05T01:11:56</modified>
 		<subtask>49@1</subtask>
-		<content>&lt;tag&gt;@travels&lt;/tag&gt;, &lt;tag&gt;@friends&lt;/tag&gt;, 
+		<content>&lt;tag&gt;@travels&lt;/tag&gt;, &lt;tag&gt;@friends&lt;/tag&gt;,
  &lt;subtask&gt;49@1&lt;/subtask&gt;</content>
 		<task-remote-ids/>
 	</task>
@@ -296,7 +296,7 @@ Have a look at the calendar, to spot where I could have some time to go on holid
 		<addeddate>2020-06-04T23:37:02</addeddate>
 		<modified>2020-06-05T01:26:21</modified>
 		<subtask>46@1</subtask>
-		<content>&lt;tag&gt;@travels&lt;/tag&gt;, 
+		<content>&lt;tag&gt;@travels&lt;/tag&gt;,
  &lt;subtask&gt;46@1&lt;/subtask&gt;</content>
 		<task-remote-ids/>
 	</task>
@@ -305,7 +305,7 @@ Have a look at the calendar, to spot where I could have some time to go on holid
 		<addeddate>2020-06-05T00:00:02</addeddate>
 		<modified>2020-06-05T09:34:53</modified>
 		<content>I need some new furniture for my apartment, I don't have enough space to put my things!
-@home 
+@home
 @stuff2buy</content>
 		<task-remote-ids/>
 	</task>
@@ -341,7 +341,7 @@ Have a look at the calendar, to spot where I could have some time to go on holid
 		<addeddate>2020-06-04T23:37:00</addeddate>
 		<modified>2020-06-05T10:03:31</modified>
 		<subtask>53@1</subtask>
-		<content>&lt;tag&gt;@travels&lt;/tag&gt;, 
+		<content>&lt;tag&gt;@travels&lt;/tag&gt;,
 
  &lt;subtask&gt;53@1&lt;/subtask&gt;</content>
 		<task-remote-ids/>
@@ -405,7 +405,7 @@ Have a look at the calendar, to spot where I could have some time to go on holid
 		<modified>2020-06-05T09:49:22</modified>
 		<subtask>56862755-348c-428d-b822-b60286370019</subtask>
 		<subtask>9ea28d46-4c78-4e90-9249-20966850c28a</subtask>
-		<content>&lt;tag&gt;@money&lt;/tag&gt;, 
+		<content>&lt;tag&gt;@money&lt;/tag&gt;,
 
  &lt;subtask&gt;56862755-348c-428d-b822-b60286370019&lt;/subtask&gt;
  &lt;subtask&gt;9ea28d46-4c78-4e90-9249-20966850c28a&lt;/subtask&gt;</content>
diff --git a/docs/contributors/DBus API v1.md b/docs/contributors/DBus API v1.md
index f886984bd0..4ab2d684d3 100644
--- a/docs/contributors/DBus API v1.md	
+++ b/docs/contributors/DBus API v1.md	
@@ -2,7 +2,7 @@ This was originally in the wiki at Apps/gtg/dbus
 That page was written by Luca Invernizzi on 2010-02-27.
 
 # Interacting with Getting Things GNOME! via dbus
-If you are on this page, you're probably interested in integrating some uber-cool software with GTG. 
+If you are on this page, you're probably interested in integrating some uber-cool software with GTG.
 First of all, kudos for that. It's good karma.
 
 ## Python
@@ -15,7 +15,7 @@ import dbus
 bus = dbus.SessionBus()
 obj = bus.get_object("org.GTG", "/org/GTG")
 gtg = dbus.Interface(obj, "org.GTG")
-for t in gtg.get_tasks(): 
+for t in gtg.get_tasks():
     print t
     print t["title"]
 ```
@@ -29,12 +29,12 @@ import dbus
 bus = dbus.SessionBus()
 obj = bus.get_object("org.GTG", "/org/GTG")
 gtg = dbus.Interface(obj, "org.GTG")
-for tid in gtg.get_task_ids("Active, Dismissed"): 
+for tid in gtg.get_task_ids("Active, Dismissed"):
     #the task id is a string which identifies the task
     print tid
     #if you want to get task properties, you need to do
     task = gtg.get_task(tid)
-    #the task object is a simple dictionary (print it 
+    #the task object is a simple dictionary (print it
     #  to see the key values)
     print task["title"]
     # once you modify that dictionary, you can feed it back to
@@ -60,7 +60,7 @@ for t in gtg.get_tasks(): print t
 
 for t in gtg.get_tasks_filtered([], ["Active"], False, False):
   print t["id"], t["title"], t["tags"]
-  
+
 for t in gtg.get_task_ids_filtered([], ["Active"], False, False):
   print t
 
diff --git a/docs/contributors/DBus API v2.md b/docs/contributors/DBus API v2.md
index 0cf3e26880..7289d5f852 100644
--- a/docs/contributors/DBus API v2.md	
+++ b/docs/contributors/DBus API v2.md	
@@ -14,11 +14,11 @@ GTG uses the bus name '''`org.gnome.GTG`''' on the session bus. Trying to access
 ## Object Paths
 Every Task and Tag in GTG can be accessed directly on the bus by its own ''object path''—there is no need to call any method like `get_task()` on the server.
 
-|  '''Path''' | '''Interfaces''' ¹ | '''Object''' | 
+|  '''Path''' | '''Interfaces''' ¹ | '''Object''' |
 |-------------|---------------------|--------------|
-|  `/org/gnome/GTG/Server` |  `org.gnome.GTG.Server`  | The GTG! daemon  | 
-|  `/org/gnome/GTG/Tag/[uuid]` |   `org.gnome.GTG.Tag` <br> `org.freedesktop.DBus.Properties`²  | Individual tags by UUID³  | 
-|  `/org/gnome/GTG/Task/[uuid]` |  `org.gnome.GTG.Task` <br> `org.freedesktop.DBus.Properties`²  | Individual tasks by UUID³  | 
+|  `/org/gnome/GTG/Server` |  `org.gnome.GTG.Server`  | The GTG! daemon  |
+|  `/org/gnome/GTG/Tag/[uuid]` |   `org.gnome.GTG.Tag` <br> `org.freedesktop.DBus.Properties`²  | Individual tags by UUID³  |
+|  `/org/gnome/GTG/Task/[uuid]` |  `org.gnome.GTG.Task` <br> `org.freedesktop.DBus.Properties`²  | Individual tasks by UUID³  |
 
 Notes:
 
@@ -34,7 +34,7 @@ This is a standard interface that is [described in the DBus specification](http:
 In GTG!, the interface is extended with ''one'' extra method named `List`:
 ```
 org.freedesktop.DBus.Properties.List (in STRING interface_name,
-                                      out ARRAY<STRING> props); 
+                                      out ARRAY<STRING> props);
 ```
 
 `List` is a faster alternative to `GetAll` that avoids a `Get` of ''every'' property. That can be slow, especially where some properties are computed instead of stored in variables.
diff --git a/docs/contributors/bug reporting and triaging.md b/docs/contributors/bug reporting and triaging.md
index cf80d32913..86fb581e7a 100644
--- a/docs/contributors/bug reporting and triaging.md	
+++ b/docs/contributors/bug reporting and triaging.md	
@@ -58,25 +58,25 @@ If a bug is assigned to you, be sure to reply as quickly as possible. If you can
 This list serves mostly for historical purposes, and to explain what we don't/can't do anymore.
 
 * **New**: this is replaced by the "Open" status in GitHub, which does not distinguish between "New", "Confirmed", or "Triaged".
-  
+
   > "the bug has not been accepted or clarified enough. Maybe you just have to wait. If you want that specific bug to be confirmed, you might help by adding a precise way to reproduce the bug or, if it's a feature request, by clarifying the feature (mockups, usecases). If this is a feature request which is not clear, we usually set the Importance to Wishlist and leave the status to New."
 
 * **Confirmed**: the closest approximation is the "reproducible-in-git" status we use to indicate whether the bug has been tested to affect the latest development version. If we can't reproduce the bug, then it would be tagged "needinfo".
-  
+
   > "the bug has been accepted as a bug we want to see fixed. It doesn't mean that we plan to work on it soon. See the importance field for that. It also doesn't mean that we agreed on a solution (even if the original bug describes a particular solution). It only means that we acknowledge that there is a problem that need to be adressed. If you work on one of those bug in your branch, you have no guarantee that it will be accepted."
 
 * **Triaged**: much like "confirmed", this does not make much sense in this day and age. We either leave a bug/feature ticket open, or we close it.
-  
+
   > "the bug has been accepted and a particular solution reached the consensus. This solution should be described in the main summary of the bug. Solving a Triaged bug is just a matter of coding according to the bug description. No further reading nor discussion should be needed. If the proposed solution implies a modification of the core UI (not plugin), it should have been approved by Bertrand, our UI manager."
 
 * **In progress**: this is replaced by "assigning" issues to people. If nobody is assigned, and there is no mention of someone working on it in a branch, assume nobody is working on it.
-  
+
   > "someone is actively working on that bug (see the assigned to field). Also use this status if the bug is fixed in your branch and then do a merge request a link the branch to that bug."
 
 * **Fix Committed**: with GitHub, we just close the tickets and target them to the next release's milestone to indicate things that have been resolved.
-  
+
   > "The bug has been fixed in the trunk (not in your branch). When changing to this status, always add the revision number that fixes that particular bug. You also have to be sure that the bug is targeted for the next release. Indeed, if the fix is in the trunk, it will be in the next release. Don't forget to do that! Also, every Fix Committed bug should be assigned to someone. If multiple people have worked to fix a bug, use the last one that will commit the fix."
 
 * **Fix Released**: unfortunately, GitHub does not have this notion of half-open tickets. Tickets are either open or closed, and when a release comes out then all the issues that were targetted to it can be considered "released".
-  
+
   > "On a given release, all the Fix Committed bugs are switched to that state."
diff --git a/docs/contributors/contributing to the user manual.md b/docs/contributors/contributing to the user manual.md
index 3d1def1b66..c8b64f0e0d 100644
--- a/docs/contributors/contributing to the user manual.md	
+++ b/docs/contributors/contributing to the user manual.md	
@@ -19,7 +19,7 @@ Follow the same pull request (PR) process [that is documented here](https://gith
 About a month prior to a release, start reviewing PRs and closed issues to see if the new features affect anything in the user manual. You can review [release milestones](https://github.com/getting-things-gnome/gtg/milestones) to help you view updates in a concise list. Review closed PRs and issues in the milestone for that release. You should look for anything that affects the UI, new plugins or sync services, and new keyboard shortcuts.
 
 ## Creating Pages
-If you want to create a new page, you can use an existing page as a template. This [Mallard walkthrough](http://projectmallard.org/about/learn/tenminutes.html) breaks down the difference between guide and topic pages so that you can better understand the structure of a Mallard help project. 
+If you want to create a new page, you can use an existing page as a template. This [Mallard walkthrough](http://projectmallard.org/about/learn/tenminutes.html) breaks down the difference between guide and topic pages so that you can better understand the structure of a Mallard help project.
 
 When starting a page, ensure you declare the appropriate Mallard namespaces:
 
@@ -32,7 +32,7 @@ When starting a page, ensure you declare the appropriate Mallard namespaces:
 ```
 
 The `info` section contains the revision history. Any time that you update a page, ensure that you add a new line for the revision history. This section also contains links that appear on the bottom of the page (`seealso` links) and links that are used for referencing the page in the `index`. See [Referencing the Index](#indexlinks) for details on adding `index` links. Ensure you add a `credit` block to give yourself credit if you are new to the project. All pages need to have an `include` referencing `legal.xml`.
-```      
+```
 <info>
     <revision pkgversion="0.4.0" date="2020-11-12" status="candidate"/>
     <link type="guide" xref="index#gtg-working-task" group="sixth"/>
@@ -53,18 +53,18 @@ The `info` section contains the revision history. Any time that you update a pag
 
 </info>
 ```
-From here, add a `title`, any number of `section` blocks, and the rest of your content! 
+From here, add a `title`, any number of `section` blocks, and the rest of your content!
 
-<a name="indexlinks"></a> 
+<a name="indexlinks"></a>
 ## Referencing the Index
 Ensure that the `index` is updated to include each page. With Mallard syntax, you need to include a link on each internal page that references where it will be in the index. For example, the page called "Understanding View Modes" contains the following link in the `info` section at the top:
 
 ```
 <link type="guide" xref="index#gtg-task-management" group="third"/>
 ```
- 
+
 This references the id for the Filtering and Organizing Tasks (`gtg-task-management`) section of the `index` where a link to "Understanding View Modes" will be displayed. On the `index`, the section looks like this:
- 
+
  ```
  <section id="gtg-task-management" style="2column">
     <title>Filtering and Organizing Tasks</title>
@@ -76,7 +76,7 @@ This references the id for the Filtering and Organizing Tasks (`gtg-task-managem
 A link to the "Understanding View Modes" page will be listed as the third item.
 
 ## Adding Images
-.png files should be saved to `gtg/docs/user_manual/C/figures/`. On the page where you are inserting the image, use the `figure` tags and include a figure title. You can also add a description in the `desc` tags. 
+.png files should be saved to `gtg/docs/user_manual/C/figures/`. On the page where you are inserting the image, use the `figure` tags and include a figure title. You can also add a description in the `desc` tags.
 
 ```
 <figure>
@@ -86,11 +86,11 @@ A link to the "Understanding View Modes" page will be listed as the third item.
 </figure>
 ```
 
-# Testing and Publishing 
+# Testing and Publishing
 ## Testing the Docs and Troubleshooting
 Always run through and test the docs! Ensure you are able to open each page. One error that can occur is if you forget to close a tag, Yelp will not open the .page file.
 
-To investigate this issue, use the below command and validate the page (replace `*.page` with the page name). You can also run this command (with `*.page`) within the `/gtg/docs/user_manual/C/` directory to validate all .page files in the user manual project. 
+To investigate this issue, use the below command and validate the page (replace `*.page` with the page name). You can also run this command (with `*.page`) within the `/gtg/docs/user_manual/C/` directory to validate all .page files in the user manual project.
 
 ```
 yelp-check validate *.page
@@ -105,9 +105,9 @@ gtg-translate.page:19: parser error : Opening and ending tag mismatch: app line
 In this example, the opening and ending tags on the `gtg-translate` page do not match on line 19. Ensure that the opening tag on this line has a corresponding ending tag (e.g., `<p>` and `</p>`).
 
 ### xmls Issue
-You may run into an issue when using a table with `ui:expanded="true"` causing the page to not display. 
+You may run into an issue when using a table with `ui:expanded="true"` causing the page to not display.
 
-In this instance, check to see if the page is declaring Mallard UI extension at: `xmlns:ui="http://projectmallard.org/ui/1.0/"`. 
+In this instance, check to see if the page is declaring Mallard UI extension at: `xmlns:ui="http://projectmallard.org/ui/1.0/"`.
 
 Any page that uses this `ui` element should include all of the following schemas:
 ```
@@ -119,7 +119,7 @@ Any page that uses this `ui` element should include all of the following schemas
 ```
 
 ## Updating `meson.build`
-The [meson.build](https://github.com/getting-things-gnome/gtg/blob/master/docs/user_manual/meson.build) file that resides in the `user_manual` folder needs to contain all of the pages and media (e.g., images and videos) contained in the user manual. Ensure that all .page and .png files are listed in the `sources` or `media` sections accordingly. 
+The [meson.build](https://github.com/getting-things-gnome/gtg/blob/master/docs/user_manual/meson.build) file that resides in the `user_manual` folder needs to contain all of the pages and media (e.g., images and videos) contained in the user manual. Ensure that all .page and .png files are listed in the `sources` or `media` sections accordingly.
 ## Building HTML Files
 Use the following command to build an HTML version for use outside of the packaged help project (e.g., in a blog):
 ```
diff --git a/docs/contributors/core architecture.md b/docs/contributors/core architecture.md
index c8aa0dc31b..ff1738f45b 100644
--- a/docs/contributors/core architecture.md	
+++ b/docs/contributors/core architecture.md	
@@ -31,11 +31,11 @@ and emit Gtk signals that can be used by the UI and plugins.
 
 ## The stores
 
-The store classes take care of managing the data types. Data is held in the 
+The store classes take care of managing the data types. Data is held in the
 `data` property. There's also a cache called `lookup`, which is a dictionary
 you can use to access items by their id. Some stores might other caches on top
 of that. In addition to accessing by id, you can also use the `find()` method in the
-`TagStore` to get a tag by name. 
+`TagStore` to get a tag by name.
 
 As mentioned above, the stores take care of (un)parenting, as well as adding an
 existing item, creating a new one, or removing one. The `TaskStore` also
diff --git a/docs/contributors/file format.md b/docs/contributors/file format.md
index a4c6832df9..a95823d621 100644
--- a/docs/contributors/file format.md	
+++ b/docs/contributors/file format.md	
@@ -262,5 +262,3 @@ whether they add subtasks or tags. See the modules `text_tags.py` and
 | `SubtaskTag`        | A `sub` tag and a `{! subtask !}` tag in content  |
 | `TaskTagTag`        | A `tag` in the task `tags`, and in `taglist`      |
 | `TitleTag`          | The `title` tag inside `task` 					  |
-
-
diff --git a/docs/contributors/plugin development guide.md b/docs/contributors/plugin development guide.md
index 54afa9c761..ae0f7bd1a4 100644
--- a/docs/contributors/plugin development guide.md	
+++ b/docs/contributors/plugin development guide.md	
@@ -33,7 +33,7 @@ Enabled=True
 * Dependencies: the python modules that the plugin has as dependencies
 * Dbus-dependencies: the remote dbus objects that the plugin has as dependencies
 
-Note: if the plugin has no dependencies or no dbus-dependencies you don't need to include these lines, all the others are mandatory 
+Note: if the plugin has no dependencies or no dbus-dependencies you don't need to include these lines, all the others are mandatory
 
 
 ## Python code
@@ -46,13 +46,13 @@ A plugin has three mandatory methods:
   * all plugins are deactivated before GTG ends so if you want to save information, this is the place to save it (for example, save the current user settings to a config file)
 * onTaskOpened(plugin_api): this method will initialize the plugin's code for the task editor.
   * There is no deactivate associated with this method, when the tas editor is closed it's object is destroyed so no need to deactivate nothing, when it loads again it will load the plugin code again
- 
+
 * In all three methods the plugin_api (plugin api) is passed. This is the plugin engine's API. This is the object that contains the methods that you can use to interact with GTG. It is a work in progress but many methods are already available. The API documentation will be available real soon.
 
 If a plugin is configurable, in the plugin manager, the preferences button will be enabled and allow the user to interact with those preferences.
 
 * `is_configurable()`: if a plugin is configurable it should have this method and it must `return True`. If the plugin isn't configurable you can `return False` or omit the method (the first option is preferred).
-* `configure_dialog(plugin_apis, plugin_manager_dialog)`: this method loads the dialog for the plugin's configurations. 
+* `configure_dialog(plugin_apis, plugin_manager_dialog)`: this method loads the dialog for the plugin's configurations.
 * Note: only if or after a plugin is selected to be enabled in the plugin manager will the plugin preferences button be enabled.
 
 A python plugin example:
@@ -62,13 +62,13 @@ A python plugin example:
 class Example:
     def __init__(self):
         self.example = "This can initialize a class"
-		
+
     def activate(self, plugin_api):
 	print "the plugin is initialized"
 
     def onTaskOpened(self, plugin_api):
 	print "a task was opened"
-		
+
     def deactivate(self, plugin_api):
         print "the plugin was deactivated"
 ```
diff --git a/docs/user_manual/C/gtg-add-sync.page b/docs/user_manual/C/gtg-add-sync.page
index 2b277547d6..1e884a0bb4 100644
--- a/docs/user_manual/C/gtg-add-sync.page
+++ b/docs/user_manual/C/gtg-add-sync.page
@@ -7,8 +7,8 @@
     <link type="guide" xref="index#gtg-sync" group="second"/>
      <link type="seealso" xref="gtg-sync"/>
       <link type="seealso" xref="gtg-caldav"/>
-     
-     <revision pkgversion="0.3.1" date="2013-06-18" status="candidate"/> 
+
+     <revision pkgversion="0.3.1" date="2013-06-18" status="candidate"/>
       <revision pkgversion="0.4.0" date="2020-05-10" status="outdated"/>
       <revision pkgversion="0.6.0" date="2022-01-17" status="candidate"/>
    <credit type="author copyright">
@@ -27,7 +27,7 @@
   </info>
 
   <title>Enabling/Disabling Synchronization Services</title>
-  
+
    <p>To enable or disable Sync Services, from the <app>GTG</app> main menu:</p>
 <steps>
     <item><p>Select <em style="strong">Synchronization</em>.</p></item>
@@ -46,4 +46,3 @@
 </figure>
 
 </page>
-
diff --git a/docs/user_manual/C/gtg-add-tag.page b/docs/user_manual/C/gtg-add-tag.page
index be5343d69b..307ef5aaf1 100644
--- a/docs/user_manual/C/gtg-add-tag.page
+++ b/docs/user_manual/C/gtg-add-tag.page
@@ -6,8 +6,8 @@
   <info>
     <link type="guide" xref="gtg-tags" group="third"/>
     <link type="seealso" xref="gtg-tag-color"/>
-    
-      
+
+
       <revision pkgversion="0.3.1" date="2013-06-18" status="candidate"/>
 <revision pkgversion="0.4.0" date="2020-05-17" status="candidate"/>
    <credit type="author copyright">
@@ -28,11 +28,11 @@
   <title>Adding or Modifying Tags</title>
 
     <p>To add a new tag or modify tags that are already assigned to a selected task, from the <gui>Task Browser</gui>, you can perform one of the following actions:</p>
-  
+
   <list>
       <item><p>Use the <keyseq><key>Ctrl</key><key>T</key></keyseq> keyboard shortcut.</p></item>
       <item><p>Right-click the task and select <gui>Modify Tags...</gui> from the context menu.</p></item>
-  </list> 
+  </list>
 
 <p>Add new tags separated by a space. To remove an already assigned tag, add the “!” sign in front of it.</p>
 
diff --git a/docs/user_manual/C/gtg-caldav.page b/docs/user_manual/C/gtg-caldav.page
index f73a5e0fa5..a03338b5b0 100644
--- a/docs/user_manual/C/gtg-caldav.page
+++ b/docs/user_manual/C/gtg-caldav.page
@@ -9,7 +9,7 @@
       <link type="seealso" xref="gtg-sync"/>
       <link type="seealso" xref="gtg-add-sync"/>
 
-      
+
       <revision pkgversion="0.6.0" date="2022-01-21" status="candidate"/>
    <credit type="author copyright">
       <name>Danielle Vansia</name>
@@ -28,8 +28,8 @@
 
   <title>CalDAV: Calendar Synchronization Service</title>
 
-  <p>CalDAV is a calendaring protocol that allows a client to access items from a server. Many calendar and task services (often included in groupware packages) provide this feature. <app>GTG</app> provides support for this standard to be able to manage all your tasks in one place. The options and required fields for the CalDAV Sync Service are described below. Once you have filled in all of the required information, click <em style="strong">Enable syncing</em> to start importing your CalDAV items.</p> 
-  
+  <p>CalDAV is a calendaring protocol that allows a client to access items from a server. Many calendar and task services (often included in groupware packages) provide this feature. <app>GTG</app> provides support for this standard to be able to manage all your tasks in one place. The options and required fields for the CalDAV Sync Service are described below. Once you have filled in all of the required information, click <em style="strong">Enable syncing</em> to start importing your CalDAV items.</p>
+
 	<note style="tip"><p>If you do not see CalDAV as an option in the dropdown on the Synchornization Services window, then you may not have the necessary dependency (the <code>python-caldav</code> module) installed. You can install this with <code>pip install caldav</code>.</p></note>
 	<note style="important"><p>Tasks need to be tagged in <app>GTG</app> with <code>DAV_[CALENDAR_NAME]</code> to be synced.</p></note>
 
@@ -49,7 +49,7 @@
 <item>
      <title><em style="strong">Service URL</em></title>
      <p>Enter the URL for the service you are looking to connect. You may need to refer to your service provider's CalDAV-related documentation to obtain this URL.</p></item></terms>
-     
+
 <note style="important"><p>The CalDAV provider might give you a URL for a specific calendar, but actually send the todos from all calendars. In this case, the CalDAV backend will end up syncing all calendars.</p></note>
 
 
diff --git a/docs/user_manual/C/gtg-complete-delete-dismiss-task.page b/docs/user_manual/C/gtg-complete-delete-dismiss-task.page
index 4e77129338..997ffa7cf1 100644
--- a/docs/user_manual/C/gtg-complete-delete-dismiss-task.page
+++ b/docs/user_manual/C/gtg-complete-delete-dismiss-task.page
@@ -9,7 +9,7 @@
     <link type="seealso" xref="gtg-edit-task"/>
     <link type="seealso" xref="gtg-subtasks"/>
     <link type="seealso" xref="gtg-set-task-date"/>
-      
+
       <revision pkgversion="0.3.1" date="2013-06-18" status="candidate"/>
       <revision pkgversion="0.4.0" date="2020-05-16" status="candidate"/>
       <revision pkgversion="0.5.0" date="2020-11-15" status="candidate"/>
@@ -30,7 +30,7 @@
   </info>
   <title>Completing, Dismissing, or Deleting Tasks</title>
   <p>There are three actions that you can perform to close tasks or remove them from your <gui>Open</gui> or <gui>Actionable</gui> view modes: complete, dismiss, or delete.</p>
-  <note><p>When working from any of the view modes, you can perform the below actions on multiple tasks by selecting the tasks while holding <key>Shift</key>. You can also perform complex, multi-selections using the <key>Ctrl</key> key.</p></note> 
+  <note><p>When working from any of the view modes, you can perform the below actions on multiple tasks by selecting the tasks while holding <key>Shift</key>. You can also perform complex, multi-selections using the <key>Ctrl</key> key.</p></note>
   <section id="complete-task">
 
   <title>Completing a Task</title>
@@ -39,7 +39,7 @@
   <list>
   <item><p>In the <gui>Open</gui> or <gui>Actionable</gui> view modes, select the task and use the <keyseq><key>Ctrl</key><key>D</key></keyseq> keyboard shortcut.</p></item>
   <item><p>Right-click the task in the <gui>Task Browser</gui>, and select <gui>Mark as Done</gui> from the context menu.</p></item>
-  <item><p>Click the <gui>Mark as Done</gui> button in the <gui>Task Editor</gui> window.</p></item></list> 
+  <item><p>Click the <gui>Mark as Done</gui> button in the <gui>Task Editor</gui> window.</p></item></list>
   <p>Once a task is marked as done, it is viewable in the <gui>Closed</gui> view mode.</p>
   <section id="reopen-task"><title>Reopening a Complete Task</title>
       <p>You may want to reopen a task that you previously marked as done. From the <gui>Closed</gui> view mode, you can perform one of the following actions:</p>
@@ -53,18 +53,18 @@
   <title>Dismissing a Task</title>
 
   <p>When you decide that a certain task is no longer valid (does not need to be accomplished), you can dismiss it. To dismiss a selected task from the <gui>Open</gui> or <gui>Actionable</gui> view modes, you can perform one of the following actions:</p>
-  
+
   <list>
       <item><p>Select the task, and use the <keyseq><key>Ctrl</key><key>I</key></keyseq> keyboard shortcut.</p></item>
       <item><p>Right-click the task in the <gui>Task Browser</gui>, and select <gui>Dismiss</gui> from the context menu.</p></item>
-</list> 
+</list>
     <p>To dismiss an open <app>GTG</app> task:</p>
 <steps>
     <item><p>Click the <media type="image" src="figures/task-toolbar-menu.png"></media> icon in the task's headerbar.</p></item>
     <item><p>Select <gui>Dismiss</gui>.</p></item>
 </steps>
-    
-    <p>You can view all of the tasks that are marked as dismissed in the <gui>Closed</gui> view mode.</p> 
+
+    <p>You can view all of the tasks that are marked as dismissed in the <gui>Closed</gui> view mode.</p>
 
 <section id="undismiss-task"><title>Undismissing a Task</title>
       <p>You may want to reopen a task that you previously dismissed. From the <gui>Closed</gui> view mode, you can perform one of the following actions:</p>
@@ -79,17 +79,17 @@
   <title>Deleting a Task</title>
 
   <p>To delete a selected task from the main <app>GTG</app> window, you can perform one of the following actions:</p>
-  
+
   <list>
      <item><p>Select the task, and use the <keyseq><key>Ctrl</key><key>Del</key></keyseq> keyboard shortcut.</p></item>
       <item><p>From any of the task view modes, right-click the task in the <gui>Task Browser</gui>, and select <gui>Delete</gui> from the context menu.</p></item>
-</list> 
- 
+</list>
+
    <p>To delete an open <app>GTG</app> task:</p>
 <steps><item><p>Click the <media type="image" src="figures/task-toolbar-menu.png"></media> icon in the task's headerbar.</p></item>
 <item><p>Select <gui>Delete</gui>.</p></item></steps>
 
 <note style="warning"> <p>Deleting a task is a permanent action. You will be asked to confirm the deletion before proceeding. If you want the ability to undo task deletions, consider using the <gui>Mark as Done</gui> or <gui>Dismiss</gui> actions instead.</p> </note>
-</section> 
- 
+</section>
+
 </page>
diff --git a/docs/user_manual/C/gtg-create-new-task.page b/docs/user_manual/C/gtg-create-new-task.page
index 53854b17ca..3426aac7d5 100644
--- a/docs/user_manual/C/gtg-create-new-task.page
+++ b/docs/user_manual/C/gtg-create-new-task.page
@@ -9,7 +9,7 @@
     <link type="seealso" xref="gtg-complete-dismiss-delete-task"/>
     <link type="seealso" xref="gtg-subtasks"/>
     <link type="seealso" xref="gtg-set-task-date"/>
-      
+
       <revision pkgversion="0.3.1" date="2013-06-18" status="candidate"/>
 <revision pkgversion="0.4.0" date="2020-05-16" status="candidate"/>
    <credit type="author copyright">
@@ -38,6 +38,5 @@
 </list>
 
   <p>The new task opens on top of the <app>GTG</app> main window or any other tasks that you may have opened.</p>
-  
-</page>
 
+</page>
diff --git a/docs/user_manual/C/gtg-create-plugin.page b/docs/user_manual/C/gtg-create-plugin.page
index 02455adb55..cb2dee5429 100644
--- a/docs/user_manual/C/gtg-create-plugin.page
+++ b/docs/user_manual/C/gtg-create-plugin.page
@@ -5,7 +5,7 @@
 
   <info>
 
-      
+
      <revision pkgversion="0.3.1" date="2013-06-18" status="candidate"/>
       <revision pkgversion="0.4.0" date="2020-05-10" status="outdated"/>
    <credit type="author copyright">
@@ -35,4 +35,3 @@
 
 
 </page>
-
diff --git a/docs/user_manual/C/gtg-create-sync.page b/docs/user_manual/C/gtg-create-sync.page
index 12420ec70b..b794ff2b91 100644
--- a/docs/user_manual/C/gtg-create-sync.page
+++ b/docs/user_manual/C/gtg-create-sync.page
@@ -4,8 +4,8 @@
       id="gtg-create-sync">
 
   <info>
-    
-  
+
+
 
       <revision pkgversion="0.3.1" date="2013-06-18" status="candidate"/>
       <revision pkgversion="0.4.0" date="2020-05-10" status="outdated"/>
@@ -24,7 +24,7 @@
     <include href="legal.xml" xmlns="http://www.w3.org/2001/XInclude"/>
 
   </info>
- 
+
   <title>Create Your Own Sync Service</title>
 
 <p>Here are some resources in case you are interested in making your own Sync Service for <app>GTG</app>:</p>
@@ -34,4 +34,3 @@
 <p><link href="https://github.com/getting-things-gnome/gtg/blob/master/docs/contributors/DBus%20API%20v1.md">DBus</link></p>
 
 </page>
-
diff --git a/docs/user_manual/C/gtg-developer-resources.page b/docs/user_manual/C/gtg-developer-resources.page
index c10fac7426..362c1d4fd3 100644
--- a/docs/user_manual/C/gtg-developer-resources.page
+++ b/docs/user_manual/C/gtg-developer-resources.page
@@ -5,7 +5,7 @@
 
   <info>
     <link type="guide" xref="index#gtg-further" group="fourth"/>
-    
+
       <revision pkgversion="0.4.0" date="2020-05-10" status="candidate"/>
       <revision pkgversion="0.6.0" date="2021-12-22" status="candidate"/>
    <credit type="author copyright">
@@ -28,4 +28,3 @@
 
 
 </page>
-
diff --git a/docs/user_manual/C/gtg-edit-task.page b/docs/user_manual/C/gtg-edit-task.page
index 65c227ef07..ff60caf4d2 100644
--- a/docs/user_manual/C/gtg-edit-task.page
+++ b/docs/user_manual/C/gtg-edit-task.page
@@ -9,7 +9,7 @@
     <link type="seealso" xref="gtg-complete-dismiss-delete-task"/>
     <link type="seealso" xref="gtg-subtasks"/>
     <link type="seealso" xref="gtg-set-task-date"/>
-      
+
       <revision pkgversion="0.3.1" date="2013-06-18" status="candidate"/>
       <revision pkgversion="0.4.0" date="2020-05-16" status="candidate"/>
       <revision pkgversion="0.5.0" date="2020-11-15" status="candidate"/>
@@ -36,7 +36,7 @@
  <list>
       <item><p>Select the task in the <gui>Task Browser</gui> and double-click it or press <key>Enter</key>.</p></item>
       <item><p> Right-click the task in the <gui>Task Browser</gui>, and select <gui>Edit</gui> from the context menu.</p></item>
-<item><p>Use the keyboard shortcut <keyseq><key>Ctrl</key><key>E</key></keyseq> to open a selected task from the <gui>Task Browser</gui>.</p></item>  
+<item><p>Use the keyboard shortcut <keyseq><key>Ctrl</key><key>E</key></keyseq> to open a selected task from the <gui>Task Browser</gui>.</p></item>
 </list>
 
 <p>Enter a task description and content in the <gui>Task Editor</gui> window. You can paste links, add tags (start with the “@” sign), and add subtasks (start with a dash “-”) inside the <gui>Task Editor</gui>. You can also add a detailed description with subheadings. Type <code># Subheading</code> to create a new subheading in the description. See the <link xref="gtg-subtasks">Subtasks</link> and <link xref="gtg-tags">Tags</link> sections for more details about the syntax.</p>
diff --git a/docs/user_manual/C/gtg-faq.page b/docs/user_manual/C/gtg-faq.page
index c40c9e1048..6c7127a597 100644
--- a/docs/user_manual/C/gtg-faq.page
+++ b/docs/user_manual/C/gtg-faq.page
@@ -6,7 +6,7 @@
   <info>
     <link type="guide" xref="index#gtg-further" group="third"/>
 
-      
+
       <revision pkgversion="0.3.1" date="2013-06-18" status="candidate"/>
 <revision pkgversion="0.4.0" date="2020-06-21" status="candidate"/>
    <credit type="author copyright">
@@ -31,29 +31,28 @@
 
 <item><p><em>How do I save the changes to the task that I just edited?</em></p>
 <p>You do not need to save the changes to the task as <app>GTG</app> does that automatically while you write.</p>
-</item> 
+</item>
 
 <item><p><em>I cannot activate some of the <app>GTG</app> plugins.</em></p>
 <p>Sometimes missing dependencies impede the activation of a plugin. <app>GTG</app> tries to identify and list all of the missing dependencies, in bold, below the deactivated plugin description so that you can install them. See the <link xref="gtg-plugins">Plugins</link> section for details.</p>
-</item> 
+</item>
 
 <item><p><em>Is there a way to set up a "waiting task" in cases where I am waiting for somebody/something else to happen before I can proceed with the task?</em></p>
 <p>Here is a possible workflow:</p>
 <steps>
     <item><p>Set the <gui>Start date</gui> for some time in the future, taking into consideration how long you want to wait.</p></item>
     <item><p>Set the <gui>Due date</gui> to <em style="strong">someday</em>.</p></item>
-    <item><p>Create a special tag such as <code>@wait</code> or <code>@delegate</code> and edit the properties of this tag so that tasks with this tag are not displayed in the <gui>Actionable</gui> view mode.</p></item> 
+    <item><p>Create a special tag such as <code>@wait</code> or <code>@delegate</code> and edit the properties of this tag so that tasks with this tag are not displayed in the <gui>Actionable</gui> view mode.</p></item>
 </steps>
-</item> 
+</item>
 
 <item><p><em>Can I make a backup of my tasks in case my computer crashes?</em></p>
 <p><app>GTG</app> regularly makes several backups of your tasks, tags and projects. If—for some unfathomable reason—<app>GTG</app> is unable to open your data, it will try to restore it from the last seven backup snapshots, if possible. In the worst case, you can restore your files manually, as all of the previous backups are also kept.</p>
 
 <p>See the "<link href="https://github.com/getting-things-gnome/gtg#where-is-my-user-data-and-config-stored">Where is my user data and config stored?</link>" section, in the <app>GTG</app> README file, in our development repository for more information about the location where <app>GTG</app> stores your data and preferences.</p>
-</item> 
+</item>
 
 </list>
 
 
 </page>
-
diff --git a/docs/user_manual/C/gtg-main-window.page b/docs/user_manual/C/gtg-main-window.page
index 24a46addae..cd0540bf2f 100644
--- a/docs/user_manual/C/gtg-main-window.page
+++ b/docs/user_manual/C/gtg-main-window.page
@@ -6,7 +6,7 @@
   <info>
     <link type="guide" xref="index#getting-started" group="first"/>
     <link type="seealso" xref="gtg-shortcut-keys"/>
-    
+
       <revision pkgversion="0.3.1" date="2013-06-18" status="candidate"/>
       <revision pkgversion="0.4.0" date="2020-05-10" status="candidate"/>
       <revision pkgversion="0.6.0" date="2021-12-22" status="candidate"/>
@@ -27,7 +27,7 @@
   </info>
 
   <title>Overview of the Main User Interface</title>
-  <p>Create, view, and maintain your tasks from the Main Window. Window sections and elements are described below.</p> 
+  <p>Create, view, and maintain your tasks from the Main Window. Window sections and elements are described below.</p>
 <figure>
   <title><app>GTG</app> Main Window</title>
   <desc> </desc>
@@ -65,7 +65,6 @@
     <p>Quickly create a task from this field. See <link xref="gtg-quickadd">Using the Quick Add Entry</link>.</p>
   </item>
   </terms>
-  
 
-</page>
 
+</page>
diff --git a/docs/user_manual/C/gtg-plugins.page b/docs/user_manual/C/gtg-plugins.page
index 58a2063b22..7f7bc72b9a 100644
--- a/docs/user_manual/C/gtg-plugins.page
+++ b/docs/user_manual/C/gtg-plugins.page
@@ -5,7 +5,7 @@
 
   <info>
     <link type="guide" xref="index#gtg-further" group="second"/>
-     
+
       <revision pkgversion="0.3.1" date="2013-06-18" status="candidate"/>
       <revision pkgversion="0.4.0" date="2020-05-10" status="candidate"/>
       <revision pkgversion="0.6.0" date="2021-12-22" status="candidate"/>
@@ -57,4 +57,3 @@
 
 
 </page>
-
diff --git a/docs/user_manual/C/gtg-preferences.page b/docs/user_manual/C/gtg-preferences.page
index 714f955823..028083c0d6 100644
--- a/docs/user_manual/C/gtg-preferences.page
+++ b/docs/user_manual/C/gtg-preferences.page
@@ -6,8 +6,8 @@
 
   <info>
     <link type="guide" xref="index#gtg-further" group="first"/>
-     
-     
+
+
       <revision pkgversion="0.4.0" date="2020-05-10" status="candidate"/>
       <revision pkgversion="0.5.0" date="2020-11-15" status="candidate"/>
 
@@ -16,7 +16,7 @@
       <email its:translate="no">daniellevansia@gmail.com</email>
       <years>2020</years>
     </credit>
-   
+
     <include href="legal.xml" xmlns="http://www.w3.org/2001/XInclude"/>
 
   </info>
@@ -53,7 +53,7 @@
 <tr>
       <td><p>Dark Mode</p></td>
       <td><p>Turn on Dark Mode for the whole application.</p></td>
-    </tr>    
+    </tr>
 <tr>
       <td><p>Clean up options</p></td>
       <td><p>You can use this option to automatically remove old, closed tasks as well as set the number of days before performing this operation.</p></td>
@@ -103,9 +103,8 @@
       <td><p>метки</p></td>
       <td><p>до</p></td>
       <td><p>отложить</p></td>
-    </tr>        
+    </tr>
 </tbody>
 </table>
 </section>
 </page>
-
diff --git a/docs/user_manual/C/gtg-quickadd.page b/docs/user_manual/C/gtg-quickadd.page
index d48b498c52..0e1d05b5e9 100644
--- a/docs/user_manual/C/gtg-quickadd.page
+++ b/docs/user_manual/C/gtg-quickadd.page
@@ -6,7 +6,7 @@
 
   <info>
     <link type="guide" xref="index#gtg-task-management" group="second"/>
-      
+
       <revision pkgversion="0.3.1" date="2013-06-18" status="candidate"/>
       <revision pkgversion="0.4.0" date="2020-05-16" status="candidate"/>
       <revision pkgversion="0.5.0" date="2020-11-15" status="candidate"/>
@@ -27,7 +27,7 @@
 
   <title>Using the Quick Add Entry</title>
 
-  <p>The <gui>Quick Add Entry</gui> is the fastest way to create a new task. The <gui>Quick Add Entry</gui> field is located below the <gui>Task Browser</gui>.</p> 
+  <p>The <gui>Quick Add Entry</gui> is the fastest way to create a new task. The <gui>Quick Add Entry</gui> field is located below the <gui>Task Browser</gui>.</p>
 
 <section id="quick-add-task">
 <title>Create a New Task Using the Quick Add Entry</title>
@@ -42,7 +42,7 @@
 </section>
 
 <section id="quick-add-dates">
-<title>Adding Dates and Tags to Tasks Using the Quick Add Entry</title> 
+<title>Adding Dates and Tags to Tasks Using the Quick Add Entry</title>
 
 <p>You can also create a task in the <gui>Quick Add Entry</gui> and at the same time specify its tags, start date, and due date. Follow the below syntax to add these options.</p>
 
@@ -56,7 +56,7 @@
 </section>
 
 <section id="quick-set-repeating">
-<title>Set Repeating Tasks Using the Quick Add Entry</title> 
+<title>Set Repeating Tasks Using the Quick Add Entry</title>
 
 <p>The <gui>Quick Add Entry</gui> is the fastest way to set a task to repeat with the <em style="strong">every:</em> keyword.</p>
 
@@ -91,5 +91,5 @@
      <p>Creates a new task with the title <em>call mum about the broken @phone</em>, with the tags <em>family</em> and <em>phone</em>, with the due date of <em>next Sunday</em>, and the start date <em>tomorrow</em>.</p></item>
 </terms>
 
-</section>    
+</section>
 </page>
diff --git a/docs/user_manual/C/gtg-recurring-task.page b/docs/user_manual/C/gtg-recurring-task.page
index be6de6c50d..4aa66cc3ce 100644
--- a/docs/user_manual/C/gtg-recurring-task.page
+++ b/docs/user_manual/C/gtg-recurring-task.page
@@ -26,12 +26,12 @@
 
   <title>Using Recurring/Repeating Tasks</title>
 
-  <p>Repeating tasks are the tasks that must be done many times, in a fixed period (day, week, month, year). By making a task repeat, the due date will hold the date by which the task must be completed. If a start date is set, the first occurrence of that task will begin from that start date.</p> 
+  <p>Repeating tasks are the tasks that must be done many times, in a fixed period (day, week, month, year). By making a task repeat, the due date will hold the date by which the task must be completed. If a start date is set, the first occurrence of that task will begin from that start date.</p>
 
 <section id="set-recurring-tasks">
 <title>Setting a Task to Repeat</title>
 
-<p>You can set a task to repeat using one of the following methods:</p> 
+<p>You can set a task to repeat using one of the following methods:</p>
 
 <list>
   <item><p>The <gui>Quick Add Entry</gui> is the fastest way. Use the keyword <em style="strong">every</em> when creating the task. See the Valid Recurring Terms section below for the valid syntax.</p></item>
diff --git a/docs/user_manual/C/gtg-search-intro.page b/docs/user_manual/C/gtg-search-intro.page
index e85fdd1a2c..01d25c13d6 100644
--- a/docs/user_manual/C/gtg-search-intro.page
+++ b/docs/user_manual/C/gtg-search-intro.page
@@ -4,7 +4,7 @@
       id="gtg-search-intro">
 
   <info>
-    
+
     <link type="guide" xref="index#gtg-search" group="first"/>
     <link type="seealso" xref="gtg-search-syntax" group="first"/>
 
diff --git a/docs/user_manual/C/gtg-set-task-date.page b/docs/user_manual/C/gtg-set-task-date.page
index 924b8b41c2..c8173295e3 100644
--- a/docs/user_manual/C/gtg-set-task-date.page
+++ b/docs/user_manual/C/gtg-set-task-date.page
@@ -9,7 +9,7 @@
     <link type="seealso" xref="gtg-edit-task"/>
     <link type="seealso" xref="gtg-complete-dismiss-delete-task"/>
     <link type="seealso" xref="gtg-subtasks"/>
-      
+
       <revision pkgversion="0.3.1" date="2013-06-18" status="candidate"/>
 <revision pkgversion="0.4.0" date="2020-05-16" status="candidate"/>
 <revision pkgversion="0.6.0" date="2021-12-22" status="candidate"/>
diff --git a/docs/user_manual/C/gtg-shortcut-keys.page b/docs/user_manual/C/gtg-shortcut-keys.page
index 471cbe38aa..ee2458dbd8 100644
--- a/docs/user_manual/C/gtg-shortcut-keys.page
+++ b/docs/user_manual/C/gtg-shortcut-keys.page
@@ -7,7 +7,7 @@
   <info>
     <link type="guide" xref="index#getting-started" group="second"/>
     <link type="seealso" xref="gtg-main-window"/>
-      
+
       <revision pkgversion="0.3.1" date="2013-06-18" status="candidate"/>
       <revision pkgversion="0.4.0" date="2020-05-10" status="candidate"/>
       <revision pkgversion="0.5.0" date="2020-11-15" status="candidate"/>
@@ -138,5 +138,5 @@
       </tbody>
     </table>
 
-   
+
 </page>
diff --git a/docs/user_manual/C/gtg-subtasks.page b/docs/user_manual/C/gtg-subtasks.page
index e75aaa6e0b..5b817324d6 100644
--- a/docs/user_manual/C/gtg-subtasks.page
+++ b/docs/user_manual/C/gtg-subtasks.page
@@ -9,7 +9,7 @@
     <link type="seealso" xref="gtg-edit-task"/>
     <link type="seealso" xref="gtg-complete-dismiss-delete-task"/>
     <link type="seealso" xref="gtg-set-task-date"/>
-      
+
       <revision pkgversion="0.3.1" date="2013-06-18" status="candidate"/>
       <revision pkgversion="0.4.0" date="2020-05-16" status="candidate"/>
       <revision pkgversion="0.5.0" date="2020-11-15" status="candidate"/>
@@ -30,7 +30,7 @@
   </info>
 
   <title>Creating and Managing Subtasks</title>
-  
+
 <p>Often, in order to accomplish a certain task, you first need to accomplish another, prerequisite task. <app>GTG</app> calls this prerequisite task a <em style="strong">subtask</em>. You can insert as many subtasks as you need for each task.</p>
 
  <section id="gtg-create-new-subtask">
@@ -41,10 +41,10 @@
  <list>
       <item><p>Start a new line in the <gui>Task Editor</gui> window with a dash (-) and a space. Then, type the subtask's title.</p></item>
       <item><p>Click the <media type="image" src="figures/insert_subtask_icon.png"/> button in the <gui>Task Editor</gui> toolbar.</p></item>
-      <item><p>Use the <keyseq><key>Ctrl</key><key>Shift</key><key>N</key></keyseq> keyboard shortcut.</p></item>  
+      <item><p>Use the <keyseq><key>Ctrl</key><key>Shift</key><key>N</key></keyseq> keyboard shortcut.</p></item>
 </list>
 
-<p>The subtask title displays with a check box and is underlined. Click the link to open the subtask in a separate <gui>Task Editor</gui> window. The parent task window closes after the subtask is opened.</p>  
+<p>The subtask title displays with a check box and is underlined. Click the link to open the subtask in a separate <gui>Task Editor</gui> window. The parent task window closes after the subtask is opened.</p>
 <note style="tip"><p>When editing a subtask, you can click the <gui>Open Parent</gui> button in the <gui>Task Editor</gui> toolbar to view and edit the subtask's parent.</p></note>
 <note style="tip"><p>You can mark a subtask as complete while in the parent task by selecting the check box next to the subtask title. Finished subtasks are displayed with strikethrough text in the <gui>Task Editor</gui>.</p></note>
 
@@ -56,17 +56,17 @@
 
 <p>You can reorganize tasks and subtasks by dragging and dropping tasks in the <gui>Task Browser</gui> to achieve the hierarchy and order that you require. Keep in mind that subtasks follow the below rules.</p>
 <list>
- 	<item><p>A subtask's due date can never be after its parent's due date. If a subtask's due date is changed to be a date after the parent task's due date, then the parent task's due date is updated to match the subtask.</p></item> 
- 	<item><p>Subtasks inherit start and due dates as well as any tags assigned to the parent task <em style="strong">at the time that the subtask is created</em>. You can individually edit these characteristics as well as make bulk updates for both tasks and subtasks.</p></item> 
+ 	<item><p>A subtask's due date can never be after its parent's due date. If a subtask's due date is changed to be a date after the parent task's due date, then the parent task's due date is updated to match the subtask.</p></item>
+ 	<item><p>Subtasks inherit start and due dates as well as any tags assigned to the parent task <em style="strong">at the time that the subtask is created</em>. You can individually edit these characteristics as well as make bulk updates for both tasks and subtasks.</p></item>
  	<item><p>When you mark a parent task as done, its subtasks will also be marked as done.</p></item>
  </list>
- 
+
  <note style="tip"><p>The number of subtasks that are associated with a parent task are listed next to the parent task in the <gui>Task Browser</gui>. You can also expand and collapse parent tasks to view associated subtasks in the <gui>Task Browser</gui>.</p></note>
- 
-<note style="tip"><p>In the <gui>Task Browser</gui>, you also have the ability to add a parent task to an existing subtask by right-clicking that subtask and selecting <em style="strong">Add a Parent task...</em> from the context menu.</p></note> 
+
+<note style="tip"><p>In the <gui>Task Browser</gui>, you also have the ability to add a parent task to an existing subtask by right-clicking that subtask and selecting <em style="strong">Add a Parent task...</em> from the context menu.</p></note>
 
 </section>
- 
+
   <section id="gtg-edit-delete-subtask">
    <title>Editing, Dismissing, and Deleting Subtasks</title>
 
diff --git a/docs/user_manual/C/gtg-sync.page b/docs/user_manual/C/gtg-sync.page
index 343a1091e4..a098998ba1 100644
--- a/docs/user_manual/C/gtg-sync.page
+++ b/docs/user_manual/C/gtg-sync.page
@@ -9,8 +9,8 @@
       <link type="seealso" xref="gtg-caldav"/>
 
       <revision pkgversion="0.3.1" date="2013-06-18" status="outdated"/>
-      <revision pkgversion="0.4.0" date="2020-05-20" status="outdated"/>      
-      <revision pkgversion="0.6.0" date="2022-01-17" status="candidate"/>		
+      <revision pkgversion="0.4.0" date="2020-05-20" status="outdated"/>
+      <revision pkgversion="0.6.0" date="2022-01-17" status="candidate"/>
 
    <credit type="author copyright">
       <name>Radina Matic</name>
@@ -33,12 +33,12 @@
 <section id="built-in-sync">
 <title>Built-In Synchronization Services</title>
 
-<p>Synchronization Services allow <app>GTG</app> to synchronize (meaning to have access or to import) tasks or other items like notes from other services.</p> 
+<p>Synchronization Services allow <app>GTG</app> to synchronize (meaning to have access or to import) tasks or other items like notes from other services.</p>
 
 <p>In GTG, there can be different types of synchronization:</p>
 <list>
       <item><p><em>Read-only synchronization</em>: The primary goal is to track things (for example, the bugs assigned to you on a bug tracking system). You cannot directly mark the task as resolved in <app>GTG</app>, but when you mark the associated bug as fixed on the bug tracking system, it will show up as such in <app>GTG</app>. Read-only also means that if you open one of the imported tasks and change the title, description, or tags, those changes are visible only to you and will be lost when the associated task is modified on the originating service. You are free to set any other field (start/due dates, subtasks, etc.), and with those field your changes will be preserved. This is useful to add personal annotations to imported tasks.</p></item>
-      <item><p><em>Import synchronization</em>: This is similar to read-only synchronization; however, you are free to change any field you want. Keep in mind that all the changes you make will be visible only on your computer. <app>GTG</app> will also make sure that no task is imported twice.</p></item> 
+      <item><p><em>Import synchronization</em>: This is similar to read-only synchronization; however, you are free to change any field you want. Keep in mind that all the changes you make will be visible only on your computer. <app>GTG</app> will also make sure that no task is imported twice.</p></item>
       <item><p><em>Full synchronization</em>: This provides the full read/write synchronization between <app>GTG</app> and the service. </p></item>
 </list>
 
@@ -58,4 +58,3 @@
 </section>
 
 </page>
-
diff --git a/docs/user_manual/C/gtg-tag-color.page b/docs/user_manual/C/gtg-tag-color.page
index 9ec50e9845..7ad0756832 100644
--- a/docs/user_manual/C/gtg-tag-color.page
+++ b/docs/user_manual/C/gtg-tag-color.page
@@ -6,7 +6,7 @@
   <info>
     <link type="guide" xref="gtg-tags" group="third"/>
     <link type="seealso" xref="gtg-add-tag"/>
-          
+
       <revision pkgversion="0.3.1" date="2013-06-18" status="candidate"/>
       <revision pkgversion="0.4.0" date="2020-05-16" status="candidate"/>
       <revision pkgversion="0.6.0" date="2022-01-06" status="candidate"/>
@@ -31,11 +31,11 @@
 
 <list>
       <item><p>To change the tag name, type a new name in the <gui>Name</gui> field.</p></item>
-      <item><p>Select a tag color from one of the predefined colors. To add your own color, in the <gui>Pick a Color</gui> pop-up, click the <gui>+</gui> under <gui>Custom</gui>. Then, click <gui>Select</gui> to confirm your color choice. To remove a selected color, click the trash icon next to the color.</p> 
+      <item><p>Select a tag color from one of the predefined colors. To add your own color, in the <gui>Pick a Color</gui> pop-up, click the <gui>+</gui> under <gui>Custom</gui>. Then, click <gui>Select</gui> to confirm your color choice. To remove a selected color, click the trash icon next to the color.</p>
       	<note style="tip"><p>You can also generate a random color for your tag. You can do this directly from the <gui>Tag Editor</gui> by choosing <em style="strong">Random</em>. You can also select and right-click a tag in the <gui>Sidebar</gui>. Then, select the <gui>Generate Color</gui> option from the context menu.</p></note></item>
       <item><p>Select an icon on the left. To remove an icon, click the trash can symbol under the selected icon button.
-</p></item> 
-<item><p>You also have the option to show or hide tasks with a certain tag from the <gui>Actionable</gui> view mode. Enable or disable the <gui>Actionable</gui> toggle. This option is very useful if you have a tag such as "someday" that you use for tasks that you would like to complete at some point in the future but are not particularly urgent at this time.</p></item> 
+</p></item>
+<item><p>You also have the option to show or hide tasks with a certain tag from the <gui>Actionable</gui> view mode. Enable or disable the <gui>Actionable</gui> toggle. This option is very useful if you have a tag such as "someday" that you use for tasks that you would like to complete at some point in the future but are not particularly urgent at this time.</p></item>
 </list>
 
 <note style="important"><p>When personalizing tags, note that <app>GTG</app> displays only an icon <em style="strong">OR</em> a colored square next to a tag in the <gui>Sidebar</gui> — not both at the same time. If you select a color for a tag, you can enable the corresponding tasks to be highlighted by that color in the <gui>Taskview</gui>. See <link xref="gtg-preferences">Preferences</link> for more information.</p></note>
@@ -45,5 +45,5 @@
   <desc> </desc>
  <media type="image" mime="image/png" src="figures/edit_tag.png"/>
 </figure>
- 
+
 </page>
diff --git a/docs/user_manual/C/gtg-tags.page b/docs/user_manual/C/gtg-tags.page
index aea3bbf72d..2cc9697f00 100644
--- a/docs/user_manual/C/gtg-tags.page
+++ b/docs/user_manual/C/gtg-tags.page
@@ -5,7 +5,7 @@
 
   <info>
     <link type="guide" xref="index#gtg-task-management" group="first"/>
-      
+
       <revision pkgversion="0.3.1" date="2013-06-18" status="candidate"/>
       <revision pkgversion="0.4.0" date="2020-05-17" status="candidate"/>
        <revision pkgversion="0.4.0" date="2020-11-15" status="candidate"/>
@@ -27,7 +27,7 @@
   <title>Tagging Tasks</title>
 
   <p>A tag is a simple word that begins with the <em style="strong">@</em> sign.</p>
-  
+
   <p>When you type a word beginning with <em style="strong">@</em>, it is displayed with yellow highlighting, which is the indicator that <app>GTG</app> considers the word to be a tag. You have the option to associate tags with custom colors. Tags are displayed with any associated custom color in the <gui>Task Editor</gui>. See <link xref="gtg-tag-color">Editing Tag Properties</link> for more information. You can select a tag while working in the <gui>Task Editor</gui> to view all other associated tasks in the <gui>Task Browser</gui>.</p>
 
 <figure>
@@ -38,6 +38,6 @@
   <p>You can use tags to sort your tasks. Tags are viewable in the <gui>Sidebar</gui>. You can enable the <gui>Sidebar</gui> from the <gui>Main Menu</gui> on the <gui>Headerbar</gui>. This displays all of the tags that you have created. When a tag is selected, all tasks that are associated with that tag are displayed. A task can have an unlimited number of tags.</p>
 
 <p>See the following sections for information on how to create and personalize tags.</p>
- 
+
   <links type="topic" groups="first second" style="2column"/>
 </page>
diff --git a/docs/user_manual/C/gtg-taskview.page b/docs/user_manual/C/gtg-taskview.page
index 02c83d6233..de09c2fd55 100644
--- a/docs/user_manual/C/gtg-taskview.page
+++ b/docs/user_manual/C/gtg-taskview.page
@@ -5,7 +5,7 @@
 
   <info>
     <link type="guide" xref="index#gtg-task-management" group="third"/>
-      
+
       <revision pkgversion="0.3.1" date="2013-06-18" status="candidate"/>
 <revision pkgversion="0.4.0" date="2020-05-17" status="candidate"/>
    <credit type="author copyright">
@@ -24,13 +24,13 @@
   </info>
 
   <title>Understanding View Modes</title>
-  
-    <p> <app>GTG</app> has three different view modes to aid with productivity and managing your tasks: <gui>Open</gui>, <gui>Actionable</gui>, and <gui>Closed</gui>. The <gui>Open</gui> view mode displays all tasks that are not marked as done or dismissed. The <gui>Closed</gui> view mode displays all completed tasks or tasks that you dismissed.</p> 
+
+    <p> <app>GTG</app> has three different view modes to aid with productivity and managing your tasks: <gui>Open</gui>, <gui>Actionable</gui>, and <gui>Closed</gui>. The <gui>Open</gui> view mode displays all tasks that are not marked as done or dismissed. The <gui>Closed</gui> view mode displays all completed tasks or tasks that you dismissed.</p>
 
 <p>The <gui>Actionable</gui> view mode displays tasks that you can complete right now and meet the following conditions:</p>
 <list>
       <item><p>The task must be "startable," meaning that the start date is today or has passed.</p></item>
-      <item><p>The task does not have any open subtasks, meaning that all of its prerequisites are met and you can complete the task itself.</p></item> 
+      <item><p>The task does not have any open subtasks, meaning that all of its prerequisites are met and you can complete the task itself.</p></item>
 </list>
 
 <p>You can further filter tasks by tag, in any view mode, by selecting a tag in the <gui>Sidebar</gui>.</p>
@@ -44,7 +44,7 @@
   <desc> </desc>
  <media type="image" mime="image/png" src="figures/workview.png"/>
 </figure>
-  
 
-  
+
+
 </page>
diff --git a/docs/user_manual/C/index.page b/docs/user_manual/C/index.page
index 197154b360..22b5fa6e7d 100644
--- a/docs/user_manual/C/index.page
+++ b/docs/user_manual/C/index.page
@@ -69,7 +69,7 @@
        first second
        third"/>
 </section>
-       
+
  <section id="gtg-further" style="2column">
     <title>Going Further</title>
     <links type="topic" style="2column" groups="
diff --git a/docs/user_manual/meson.build b/docs/user_manual/meson.build
index 26860042d8..ce0dd51a5f 100644
--- a/docs/user_manual/meson.build
+++ b/docs/user_manual/meson.build
@@ -45,4 +45,3 @@ gnome.yelp('gtg',
     'figures/workview.png',
   ]
 )
-
diff --git a/launch.sh b/launch.sh
index d8c141695f..d5ac01b98e 100755
--- a/launch.sh
+++ b/launch.sh
@@ -1,7 +1,7 @@
 #!/usr/bin/env bash
 
 # This script allows contributors to run GTG directly from the gtg directory without the need to navigate
-# to the scripts folder. 
+# to the scripts folder.
 # It refers to the GTG debug script originally placed in /scripts/debug.sh.
 # Makes life much easier.
 
diff --git a/snap/snapcraft.yaml b/snap/snapcraft.yaml
index 97dc981128..8ef1a0d78f 100644
--- a/snap/snapcraft.yaml
+++ b/snap/snapcraft.yaml
@@ -15,7 +15,7 @@ apps:
     common-id: org.gnome.GTG
     plugs: [network]
     slots: [dbus-service]
- 
+
 slots:
   dbus-service:
     interface: dbus
@@ -47,7 +47,7 @@ parts:
   liblarch:
     source: https://github.com/getting-things-gnome/liblarch
     source-tag: v3.2.0
-    source-type: git    
+    source-type: git
     plugin: python
     build-environment:
       - SNAPCRAFT_PYTHON_INTERPRETER: python3.8
diff --git a/tests/conftest.py b/tests/conftest.py
index 9652781f9d..6ae3afdfc6 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -20,4 +20,3 @@
 
 def pytest_collection(session):
     gi_version_requires()
-
diff --git a/tests/core/test_task2.py b/tests/core/test_task2.py
index 6400941671..bc61a0cf3d 100644
--- a/tests/core/test_task2.py
+++ b/tests/core/test_task2.py
@@ -640,5 +640,3 @@ def test_sort_custom_list(self):
         task_store.sort(tasks, key='title')
         expected = [task1, task2, task4]
         self.assertEqual(tasks, expected)
-
-