[issue46306] Suspicious operation in `doctest.py`: `None - 1`

[Eric V. Smith]

Eric V. Smith <eric at trueblade.com> added the comment:


New changeset 0fc58c1e051026baff4919d8519ce2aabe3b2ba1 by Nikita Sobolev in branch 'main':
bpo-46306: simplify `CodeType` attribute access in `doctest.py` (GH-30481)
https://github.com/python/cpython/commit/0fc58c1e051026baff4919d8519ce2aabe3b2ba1


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nosy: +eric.smith

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<https://bugs.python.org/issue46306>
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