--- a/hgext/histedit.py	Sat Aug 03 16:37:17 2013 +0200
+++ b/hgext/histedit.py	Sat Aug 03 16:40:13 2013 +0200
@@ -583,7 +583,7 @@
     if not newchildren:
         # `parentctxnode` should match but no result. This means that
         # currentnode is not a descendant from parentctxnode.
-        msg = _('working directory parent is not a descendant of %s')
+        msg = _('%s is not an ancestor of working directory')
         hint = _('update to %s or descendant and run "hg histedit '
                  '--continue" again') % parentctx
         raise util.Abort(msg % parentctx, hint=hint)

--- a/tests/test-histedit-edit.t	Sat Aug 03 16:37:17 2013 +0200
+++ b/tests/test-histedit-edit.t	Sat Aug 03 16:40:13 2013 +0200
@@ -73,7 +73,7 @@
   $ hg up 0
   0 files updated, 0 files merged, 3 files removed, 0 files unresolved
   $ HGEDITOR='echo foobaz > ' hg histedit --continue
-  abort: working directory parent is not a descendant of 055a42cdd887
+  abort: 055a42cdd887 is not an ancestor of working directory
   (update to 055a42cdd887 or descendant and run "hg histedit --continue" again)
   [255]
   $ hg up 3