diff -r bf6b476f3b36 -r 80c5b2666a96 hgext/win32mbcs.py
--- a/hgext/win32mbcs.py	Fri Apr 10 23:12:33 2015 -0700
+++ b/hgext/win32mbcs.py	Tue Apr 28 16:44:37 2015 -0400
@@ -48,6 +48,10 @@
 import os, sys
 from mercurial.i18n import _
 from mercurial import util, encoding
+# Note for extension authors: ONLY specify testedwith = 'internal' for
+# extensions which SHIP WITH MERCURIAL. Non-mainline extensions should
+# be specifying the version(s) of Mercurial they are tested with, or
+# leave the attribute unspecified.
 testedwith = 'internal'
 
 _encoding = None                                # see extsetup