Traceback-trimming of contextlib under Python 3.11

[Cheukting]

Trimming contextlib traceback for Python 3.11

closes #3298

[Zac-HD]

If you want to fill out the release notes (e.g. "This patch by Cheuk Ting Ho improves traceback trimming on Python 3.11 prereleases (:issue:`3298`).") and delete the test skip, I'm happy to merge this as an interim measure.

hypothesis/hypothesis-python/tests/conftest.py

Lines 39 to 43 in 114bcad

	assert sys.version_info.releaselevel == "alpha"
	# TODO: our traceback elision doesn't work with Python 3.11's nice new format yet
	collect_ignore_glob.append("cover/test_traceback_elision.py")
	collect_ignore_glob.append("pytest/test_capture.py")

[Zac-HD]

Thanks so much for working on this at the sprints today Cheuk! After talking to some core devs, we're going to wait until this is fixed upstream in beta 1.