Fix new flake8 warnings

beetsplug/replaygain.py

@@ -613,7 +613,7 @@ class FfmpegBackend(Backend):
             return float(value)
         except ValueError:
             raise ReplayGainError(
-                u"ffmpeg output: expected float value, found {1}"
+                u"ffmpeg output: expected float value, found {0}"
                 .format(value)
                 )
 

test/test_player.py

@@ -241,6 +241,8 @@ def implements(commands, expectedFailure=False):  # noqa: N803
 
 
 bluelet_listener = bluelet.Listener
+
+
 @mock.patch("beets.util.bluelet.Listener")
 def start_server(args, assigned_port, listener_patch):
     """Start the bpd server, writing the port to `assigned_port`.

test/test_playlist.py

@@ -120,7 +120,7 @@ class PlaylistQueryTestHelper(PlaylistTestHelper):
         ]))
 
     def test_name_query_with_nonexisting_playlist(self):
-        q = u'playlist:nonexisting'.format(self.playlist_dir)
+        q = u'playlist:nonexisting'
         results = self.lib.items(q)
         self.assertEqual(set(results), set())