Codestyle fixes

Author: vladvildanov

tests/test_asyncio/test_sentinel.py

@@ -284,4 +284,4 @@ async def test_repr_correctly_represents_connection_object(sentinel):
     assert (
         str(connection)
         == "<redis.asyncio.sentinel.SentinelManagedConnection,host=127.0.0.1,port=6379)>"  # noqa: E501
-    )
+    )