Misc code cleanups accumulated while working on other changes (#34787)

Release Notes:

- N/A

crates/dap/src/registry.rs

@@ -46,6 +46,7 @@ impl DapRegistry {
         let name = adapter.name();
         let _previous_value = self.0.write().adapters.insert(name, adapter);
     }
+
     pub fn add_locator(&self, locator: Arc<dyn DapLocator>) {
         self.0.write().locators.insert(locator.name(), locator);
     }