cmdutil.bailifchanged: standardize error message for dirty working dir

This affects rebase, graft, histedit, and other similar commands.

mercurial/cmdutil.py

@@ -84,7 +84,7 b' def bailifchanged(repo):'
         raise util.Abort(_('outstanding uncommitted merge'))
     modified, added, removed, deleted = repo.status()[:4]
     if modified or added or removed or deleted:
-        raise util.Abort(_("outstanding uncommitted changes"))
+        raise util.Abort(_('uncommitted changes'))
     ctx = repo[None]
     for s in sorted(ctx.substate):
         if ctx.sub(s).dirty():

tests/test-graft.t

@@ -71,7 +71,7 b" Can't graft with dirty wd:"
   $ hg up -q 0
   $ echo foo > a
   $ hg graft 1
-  abort: outstanding uncommitted changes
+  abort: uncommitted changes
   [255]
   $ hg revert a