diff -r 4ed3e5725eda -r c0620ccc16ef mercurial/context.py
--- a/mercurial/context.py	Thu Aug 15 15:04:36 2013 -0500
+++ b/mercurial/context.py	Thu Aug 15 15:04:55 2013 -0500
@@ -1578,9 +1578,6 @@
             self._text = editor(self._repo, self, [])
             self._repo.savecommitmessage(self._text)
 
-    def __nonzero__(self):
-        return True
-
     def __getitem__(self, key):
         return self.filectx(key)