[docs] [issue34344] Fix the docstring for AbstractEventLoopPolicy.get_event_loop

Change by miss-islington <mariatta.wijaya+miss-islington@gmail.com>: ---------- pull_requests: +16159 pull_request: https://github.com/python/cpython/pull/16568 _______________________________________ Python tracker <report@bugs.python.org> <https://bugs.python.org/issue34344> _______________________________________