--- a/mercurial/revset.py	Wed Sep 17 23:21:20 2014 +0900
+++ b/mercurial/revset.py	Tue Sep 16 23:34:18 2014 -0700
@@ -2835,10 +2835,10 @@
         return self
 
     def isascending(self):
-        return self._start < self._end
+        return self._start <= self._end
 
     def isdescending(self):
-        return self._start > self._end
+        return self._start >= self._end
 
     def filter(self, l):
         if self._start <= self._end: