[issue33183] Refactoring: replacing some assertTrue by assertIn

Serhiy Storchaka added the comment: This is a duplicate of issue16510. -- nosy: +serhiy.storchaka resolution: -> duplicate stage: -> resolved status: open -> closed superseder: -> Using appropriate checks in tests ___ Python tracker

[issue33183] Refactoring: replacing some assertTrue by assertIn

New submission from Stéphane Blondon : In several cases, tests use ```self.assertTrue(a in b)```. Using ```self.assertIn(a, b)``` seems to be better. For examples: ./Lib/test/test_inspect.py: self.assertTrue('(po, pk' in repr(sig)) ./Lib/test/test_configparser.py: self.assertTrue('that_val