bpo-37908: Add an example of ArgumentParser.exit() (GH-15455)


Co-Authored-By: Brandt Bucher <brandtbucher@gmail.com>
(cherry picked from commit b1a2abdb06408ffc4f13d6ff50351ad49c99afc0)

Co-authored-by: Hai Shi <shihai1992@gmail.com>
1 file changed