--- a/mercurial/util.py Sun Aug 13 15:20:16 2017 +0900
+++ b/mercurial/util.py Tue Aug 15 19:27:24 2017 +0900
@@ -3752,6 +3752,8 @@
value = docobject()
value.__doc__ = doc
+ value._origdoc = engine.bundletype.__doc__
+ value._origfunc = engine.bundletype
items[bt[0]] = value