[docs] [issue28331] "CPython implementation detail:" is removed when contents is translated

INADA Naoki added the comment: Yes. Actually speaking, this patch is almost copy from VersionChanged directive. See here: https://github.com/sphinx-doc/sphinx/blob/master/sphinx/directives/other.py#... ---------- _______________________________________ Python tracker <report@bugs.python.org> <http://bugs.python.org/issue28331> _______________________________________