Backport recent improvements to the error message when trying to call issubclass() against a protocol with non-method members - #304

Backport recent improvements to the error message when trying to call issubclass() against a protocol with non-method members#304

JelleZijlstra merged 2 commits into

python:mainpython/typing_extensions:mainfrom

AlexWaygood:protocol-error-msgAlexWaygood/typing_extensions:protocol-error-msgCopy head branch name to clipboard