Fix a bunch of other low-hanging style lints (#36498)

- **Fix a bunch of low hanging style lints like unnecessary-return**
- **Fix single worktree violation**
- **And the rest**

Release Notes:

- N/A

crates/markdown_preview/src/markdown_parser.rs

@@ -76,22 +76,22 @@ impl<'a> MarkdownParser<'a> {
         if self.eof() || (steps + self.cursor) >= self.tokens.len() {
             return self.tokens.last();
         }
-        return self.tokens.get(self.cursor + steps);
+        self.tokens.get(self.cursor + steps)
     }
 
     fn previous(&self) -> Option<&(Event<'_>, Range<usize>)> {
         if self.cursor == 0 || self.cursor > self.tokens.len() {
             return None;
         }
-        return self.tokens.get(self.cursor - 1);
+        self.tokens.get(self.cursor - 1)
     }
 
     fn current(&self) -> Option<&(Event<'_>, Range<usize>)> {
-        return self.peek(0);
+        self.peek(0)
     }
 
     fn current_event(&self) -> Option<&Event<'_>> {
-        return self.current().map(|(event, _)| event);
+        self.current().map(|(event, _)| event)
     }
 
     fn is_text_like(event: &Event) -> bool {

crates/markdown_preview/src/markdown_renderer.rs

@@ -111,11 +111,10 @@ impl RenderContext {
     /// buffer font size changes. The callees of this function should be reimplemented to use real
     /// relative sizing once that is implemented in GPUI
     pub fn scaled_rems(&self, rems: f32) -> Rems {
-        return self
-            .buffer_text_style
+        self.buffer_text_style
             .font_size
             .to_rems(self.window_rem_size)
-            .mul(rems);
+            .mul(rems)
     }
 
     /// This ensures that children inside of block quotes