Codestyle fix

Author: vladvildanov

redis/asyncio/sentinel.py

@@ -29,9 +29,7 @@ def __init__(self, **kwargs):
         super().__init__(**kwargs)
 
     def __repr__(self):
-        s = (
-            f"<{self.__class__.__module__}.{self.__class__.__name__}"
-        )
+        s = f"<{self.__class__.__module__}.{self.__class__.__name__}"
         if self.host:
             host_info = f",host={self.host},port={self.port}"
             s += host_info