gh-98624 Add mutex to unittest.mock.NonCallableMock (#98688)

* Added lock to NonCallableMock in unittest.mock

* Add blurb

* Nitpick blurb

* Edit comment based on @Jason-Y-Z's review

* Add link to GH issue

noah-weingarden committed 3y ago

0346eddbe933b5f1f56151bdebf5bd49392bc275

Parent: fbcafa6

Committed by GitHub <noreply@github.com> on 10/28/2022, 7:51:18 AM