Fix lint errors

Author: YukaSadaoka

Lib/test/test_free_threading/test_perf_trampoline.py

@@ -71,12 +71,12 @@ def worker():
         threading_helper.run_concurrently(
             nthreads=NTHREADS, worker_func=worker
         )
-        
+
         del shared_func
         del shared_ns
         # Single final sweep to clean up shared resources safely
         gc.collect()
 
 
 if __name__ == "__main__":
-    unittest.main()
+    unittest.main()