Format code with yapf

This commit fixes the style issues introduced in 2b40b47 according to the output
from yapf.

Details: https://deepsource.io/gh/kokarare1212/librespot-python/transform/4370f54c-a381-41c5-9e2a-449638c44abe/

librespot/core/Session.py

@@ -852,7 +852,8 @@ class Session(Closeable, SubListener, DealerClient.MessageListener):
 
     class SpotifyAuthenticationException(Exception):
         def __init__(self, login_failed: Keyexchange.APLoginFailed):
-            super().__init__(Keyexchange.ErrorCode.Name(login_failed.error_code))
+            super().__init__(
+                Keyexchange.ErrorCode.Name(login_failed.error_code))
 
     class Accumulator:
         buffer: bytes = bytes()