fix lint

Author: deadlovelll

Lib/test/test_asyncio/test_tasks.py

@@ -349,7 +349,7 @@ async def coro():
         file = io.StringIO()
         task.print_stack(file=file)
         self.assertIn('    1 / 0\n', file.getvalue())
-        
+
     def test_get_stack_async_generator(self):
         # gh-161178
         async def gen():