[issue42501] Improve error messages for argparse choices using enum

[Raymond Hettinger]

Raymond Hettinger <raymond.hettinger at gmail.com> added the comment:


New changeset 7f82f22eba1312617e1aa19cb916da1aae1609a4 by Raymond Hettinger in branch 'master':
bpo-42501:  Revise the usage note for Enums with the choices (GH-23563)
https://github.com/python/cpython/commit/7f82f22eba1312617e1aa19cb916da1aae1609a4


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