--- a/mercurial/hg.py	Mon Jan 04 21:54:46 2016 -0800
+++ b/mercurial/hg.py	Thu Dec 31 08:16:59 2015 +0000
@@ -52,7 +52,7 @@
     if not hashbranch and not branches:
         x = revs or None
         if util.safehasattr(revs, 'first'):
-            y =  revs.first()
+            y = revs.first()
         elif revs:
             y = revs[0]
         else: