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/languages/src/go.rs

@@ -452,7 +452,7 @@ async fn get_cached_server_binary(container_dir: PathBuf) -> Option<LanguageServ
                 && entry
                     .file_name()
                     .to_str()
-                    .map_or(false, |name| name.starts_with("gopls_"))
+                    .is_some_and(|name| name.starts_with("gopls_"))
             {
                 last_binary_path = Some(entry.path());
             }

crates/languages/src/json.rs

@@ -280,7 +280,7 @@ impl JsonLspAdapter {
             )
         })?;
         writer.replace(config.clone());
-        return Ok(config);
+        Ok(config)
     }
 }
 

crates/languages/src/python.rs

@@ -828,7 +828,7 @@ impl ToolchainLister for PythonToolchainProvider {
                         .get_env_var("CONDA_PREFIX".to_string())
                         .map(|conda_prefix| {
                             let is_match = |exe: &Option<PathBuf>| {
-                                exe.as_ref().map_or(false, |e| e.starts_with(&conda_prefix))
+                                exe.as_ref().is_some_and(|e| e.starts_with(&conda_prefix))
                             };
                             match (is_match(&lhs.executable), is_match(&rhs.executable)) {
                                 (true, false) => Ordering::Less,

crates/languages/src/rust.rs

@@ -403,7 +403,7 @@ impl LspAdapter for RustLspAdapter {
                 } else if completion
                     .detail
                     .as_ref()
-                    .map_or(false, |detail| detail.starts_with("macro_rules! "))
+                    .is_some_and(|detail| detail.starts_with("macro_rules! "))
                 {
                     let text = completion.label.clone();
                     let len = text.len();
@@ -496,7 +496,7 @@ impl LspAdapter for RustLspAdapter {
         let enable_lsp_tasks = ProjectSettings::get_global(cx)
             .lsp
             .get(&SERVER_NAME)
-            .map_or(false, |s| s.enable_lsp_tasks);
+            .is_some_and(|s| s.enable_lsp_tasks);
         if enable_lsp_tasks {
             let experimental = json!({
                 "runnables": {