diff --git a/youtube_dl/extractor/common.py b/youtube_dl/extractor/common.py
index 7fa46d295..81623bfe3 100644
--- a/youtube_dl/extractor/common.py
+++ b/youtube_dl/extractor/common.py
@@ -36,7 +36,6 @@
 )
 
 
-
 class InfoExtractor(object):
     """Information Extractor class.