Black re-formatting.

borgmatic/commands/borgmatic.py

@@ -160,9 +160,7 @@ def parse_arguments(*arguments):
         raise ValueError('The --progress option can only be used with the --create option')
 
     if args.stats and not (args.create or args.prune):
-        raise ValueError(
-            'The --stats option can only be used with the --create or --prune options'
-        )
+        raise ValueError('The --stats option can only be used with the --create or --prune options')
 
     if args.json and not (args.create or args.list or args.info):
         raise ValueError(