[issue26568] Add a new warnings.showwarnmsg() function taking a warnings.WarningMessage object

[STINNER Victor]

STINNER Victor added the comment:


New changeset d0aac5da59b1bbd113e6081d7c807ad5bced8a05 by Victor Stinner in branch '3.6':
bpo-30812: Fix test_warnings, restore _showwarnmsg (#2504) (#2507)
https://github.com/python/cpython/commit/d0aac5da59b1bbd113e6081d7c807ad5bced8a05


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