diff -r 7eba8f83129b -r e7aa113b14f7 mercurial/utils/stringutil.py
--- a/mercurial/utils/stringutil.py	Wed Aug 01 12:57:15 2018 -0700
+++ b/mercurial/utils/stringutil.py	Wed Aug 01 13:00:45 2018 -0700
@@ -464,7 +464,7 @@
         def _cutdown(self, ucstr, space_left):
             l = 0
             colwidth = encoding.ucolwidth
-            for i in xrange(len(ucstr)):
+            for i in pycompat.xrange(len(ucstr)):
                 l += colwidth(ucstr[i])
                 if space_left < l:
                     return (ucstr[:i], ucstr[i:])