[Docs-bugs] [issue45680] Documentation on `GenericAlias` objects and `__class_getitem__` could be improved

Change by miss-islington <mariatta.wijaya+miss-islington@gmail.com>: ---------- pull_requests: +27702 pull_request: https://github.com/python/cpython/pull/29448 _______________________________________ Python tracker <report@bugs.python.org> <https://bugs.python.org/issue45680> _______________________________________