mercurial/cmdutil.py

--- a/mercurial/cmdutil.py	Tue Sep 20 12:24:01 2016 -0700
+++ b/mercurial/cmdutil.py	Fri Sep 02 21:46:00 2016 +0000
@@ -2509,8 +2509,8 @@
         for f in added:
             count += 1
             ui.progress(_('skipping'), count, total=total, unit=_('files'))
-            warnings.append(_('not removing %s: file has been marked for add'
-                      ' (use forget to undo)\n') % m.rel(f))
+            warnings.append(_("not removing %s: file has been marked for add"
+                      " (use 'hg forget' to undo add)\n") % m.rel(f))
             ret = 1
         ui.progress(_('skipping'), None)