[docs] [issue33470] Changes from GH-1638 (GH-3575, bpo-28411) are not documented in Porting to Python 3.7

[Miro Hrončok]

Miro Hrončok <miro at hroncok.cz> added the comment:

Sorry for mixing two things here, but I meant that I found out about this because of the private API use in gdb, however nothing from the change is documented on whatsnew at all. This bug was a reaction for https://github.com/python/cpython/pull/1638#issuecomment-388497381

----------

_______________________________________
Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue33470>
_______________________________________