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/worktree/src/worktree_settings.rs

@@ -82,7 +82,7 @@ impl Settings for WorktreeSettings {
                     .ancestors()
                     .map(|a| a.to_string_lossy().into())
             })
-            .filter(|p| p != "")
+            .filter(|p: &String| !p.is_empty())
             .collect();
         file_scan_exclusions.sort();
         private_files.sort();