[issue40372] doctest example programs should exit 1 if any test fails

[Roundup Robot]

Change by Roundup Robot <devnull at psf.upfronthosting.co.za>:


----------
keywords: +patch
nosy: +python-dev
nosy_count: 2.0 -> 3.0
pull_requests: +18997
stage:  -> patch review
pull_request: https://github.com/python/cpython/pull/19673

_______________________________________
Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue40372>
_______________________________________