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/project/src/project_tests.rs

@@ -2947,9 +2947,10 @@ fn chunks_with_diagnostics<T: ToOffset + ToPoint>(
 ) -> Vec<(String, Option<DiagnosticSeverity>)> {
     let mut chunks: Vec<(String, Option<DiagnosticSeverity>)> = Vec::new();
     for chunk in buffer.snapshot().chunks(range, true) {
-        if chunks.last().map_or(false, |prev_chunk| {
-            prev_chunk.1 == chunk.diagnostic_severity
-        }) {
+        if chunks
+            .last()
+            .is_some_and(|prev_chunk| prev_chunk.1 == chunk.diagnostic_severity)
+        {
             chunks.last_mut().unwrap().0.push_str(chunk.text);
         } else {
             chunks.push((chunk.text.to_string(), chunk.diagnostic_severity));