[docs] [issue37883] threading.Lock.locked is not documented

Tal Einat <taleinat+python@gmail.com> added the comment: Ido, I don't see why this should be closed. The suggestion is good and the PR is good. I'm only waiting for the CLA signing to be worked through to merge the PR. ---------- _______________________________________ Python tracker <report@bugs.python.org> <https://bugs.python.org/issue37883> _______________________________________