diff -r 8494944940e5 -r 349bcd7fa670 mercurial/cmdutil.py
--- a/mercurial/cmdutil.py	Sun Oct 22 23:04:07 2017 +0900
+++ b/mercurial/cmdutil.py	Sun Oct 22 22:38:16 2017 +0900
@@ -1585,8 +1585,6 @@
         if rev in self.hunk:
             self.ui.write(self.hunk[rev])
             del self.hunk[rev]
-            return 1
-        return 0
 
     def close(self):
         if self.footer: