diff -r 1b25c648d5b7 -r e962c70c0aad mercurial/smartset.py
--- a/mercurial/smartset.py	Mon Jun 12 15:34:31 2017 -0700
+++ b/mercurial/smartset.py	Sun Jun 11 00:21:38 2017 +0900
@@ -1021,7 +1021,7 @@
     def __repr__(self):
         d = {False: '-', True: '+'}[self._ascending]
         return '<%s%s %d:%d>' % (type(self).__name__, d,
-                                 self._start, self._end - 1)
+                                 self._start, self._end)
 
 class fullreposet(spanset):
     """a set containing all revisions in the repo