diff -r 21b363bd87dc -r b502138f5faa mercurial/revset.py
--- a/mercurial/revset.py	Mon Jan 04 21:54:46 2016 -0800
+++ b/mercurial/revset.py	Thu Dec 31 08:16:59 2015 +0000
@@ -2290,7 +2290,7 @@
     elif op == 'not':
         # Optimize not public() to _notpublic() because we have a fast version
         if x[1] == ('func', ('symbol', 'public'), None):
-            newsym =  ('func', ('symbol', '_notpublic'), None)
+            newsym = ('func', ('symbol', '_notpublic'), None)
             o = optimize(newsym, not small)
             return o[0], o[1]
         else: