[behindkink] Remove superfluous whitespace

youtube_dl/extractor/behindkink.py

@@ -31,7 +31,7 @@ class BehindKinkIE(InfoExtractor):
 
         video_url = self._search_regex(
             r'<source src="([^"]+)"', webpage, 'video URL')
-        video_id =  url_basename(video_url).split('_')[0]
+        video_id = url_basename(video_url).split('_')[0]
         upload_date = mobj.group('year') + mobj.group('month') + mobj.group('day')
 
         return {