[3.10] bpo-25479: add unit test for __subclasshook__ in test_abc.py (GH-24034) (GH-26065)

Co-authored-by: Szymon Trapp
(cherry picked from commit 5010c044c73ee55d0fd578cfecd3f4c3f01a4140)

Co-authored-by: Karl Dubost <karl+github@la-grange.net>
1 file changed