fix some new clippy warnings

Cargo.toml

@@ -5,7 +5,7 @@ edition = "2021"
 license = "MIT"
 name = "reedline"
 repository = "https://github.com/nushell/reedline"
-rust-version = "1.62.1"
+rust-version = "1.63.0"
 version = "0.32.0"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html

src/core_editor/clip_buffer.rs

@@ -6,10 +6,12 @@ pub trait Clipboard: Send {
 
     fn get(&mut self) -> (String, ClipboardMode);
 
+    #[allow(dead_code)]
     fn clear(&mut self) {
         self.set("", ClipboardMode::Normal);
     }
 
+    #[allow(dead_code)]
     fn len(&mut self) -> usize {
         self.get().0.len()
     }
@@ -41,7 +43,7 @@ impl LocalClipboard {
 
 impl Clipboard for LocalClipboard {
     fn set(&mut self, content: &str, mode: ClipboardMode) {
-        self.content = content.to_owned();
+        content.clone_into(&mut self.content);
         self.mode = mode;
     }
 

src/menu/description_menu.rs

@@ -589,7 +589,7 @@ impl Menu for DescriptionMenu {
                     .examples
                     .get(example_index)
                     .expect("the example index is always checked");
-                suggestion.value = example.clone();
+                suggestion.value.clone_from(example);
             }
             replace_in_buffer(Some(suggestion), editor);
         }