manage.py: Add comments

manage.py

@@ -742,8 +742,10 @@ def lint(filename, additional_properties):
 
     # Disallow additional properties
     set_additional_properties(schema, additional_properties)
+
     format_checker = FormatChecker()
 
+    # Load sustainability modules mapping
     with open(filename) as f:
         elements = yaml.safe_load(f)
 
@@ -810,11 +812,11 @@ def lint(filename, additional_properties):
 def update_sustainability_docs():
     """Update docs/cost/ids/sustainability.md"""
 
-    # Load sustainability modules documentation
+    # Load sustainability mapping documentation
     with (basedir / 'docs' / 'cost' / 'ids' / 'sustainability.md').open() as f:
         docs = f.readlines()
 
-    # Preserve content that appears before the generated reference content for each module
+    # Preserve content that appears before the content generated by this function
     module_index = docs.index("## Economic and fiscal\n")
     docs = docs[:module_index]