fix: lint trailing whitespace

Author: deadlovelll

Lib/test/test_asyncio/test_base_events.py

@@ -1041,15 +1041,15 @@ async def iter_one():
 
         asyncio.create_task(iter_one())
         return status
-        
+
     def test_shutdown_asyncgens_reports_cancelled_error(self):
         # gh-150866: shutdown_asyncgens silently swallowed
         # CancelledError raised during aclose() because the check was
         # isinstance(result, Exception), but CancelledError inherits
         # from BaseException.
         self.loop._process_events = mock.Mock()
         self.loop._write_to_self = mock.Mock()
-        
+
         async def agen_cancel():
             try:
                 yield 1