[docs] [issue42675] Document changes made in bpo-42195

Guido van Rossum <guido@python.org> added the comment: New changeset 597ebc8cf604de49eabbc7b83be2debd005d7819 by kj in branch '3.9': [3.9] bpo-42675: Document collections.abc.Callable changes (GH-23839) (#23852) https://github.com/python/cpython/commit/597ebc8cf604de49eabbc7b83be2debd005... ---------- _______________________________________ Python tracker <report@bugs.python.org> <https://bugs.python.org/issue42675> _______________________________________