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/snippet/src/snippet.rs

@@ -33,7 +33,7 @@ impl Snippet {
                 choices: None,
             };
 
-            if !tabstops.last().map_or(false, |t| *t == end_tabstop) {
+            if !tabstops.last().is_some_and(|t| *t == end_tabstop) {
                 tabstops.push(end_tabstop);
             }
         }