Fix small syntax error in hub_utils.py (fixes #942)

Summary: Pull Request resolved: https://github.com/pytorch/fairseq/pull/944

Differential Revision: D16593568

Pulled By: myleott

fbshipit-source-id: 611bccae2ad0b8dc704c47a8a3343161010c2356

fairseq/hub_utils.py

@@ -18,7 +18,7 @@ def from_pretrained(
     checkpoint_file='model.pt',
     data_name_or_path='.',
     archive_map=None,
-    **kwargs,
+    **kwargs
 ):
     from fairseq import checkpoint_utils, file_utils