mercurial/cmdutil.py

--- a/mercurial/cmdutil.py	Tue Apr 05 01:35:58 2016 +0000
+++ b/mercurial/cmdutil.py	Fri Jun 03 15:55:07 2016 +0200
@@ -3301,10 +3301,12 @@
         else:
             diff = patch.diff(repo, None, ctx.node(), m, opts=diffopts)
         originalchunks = patch.parsepatch(diff)
+        operation = _('discard') if node == parent else _('revert')
 
         try:
 
-            chunks, opts = recordfilter(repo.ui, originalchunks)
+            chunks, opts = recordfilter(repo.ui, originalchunks,
+                                        operation=operation)
             if reversehunks:
                 chunks = patch.reversehunks(chunks)