[issue13337] IGNORE_CASE doctest option flag

[Gregory P. Smith]

Gregory P. Smith <greg at krypto.org> added the comment:

FWIW, while i'm never a fan of doctests, this would also help reduce the impact of other golden value tests where different platforms capitalize their error messages or not.

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nosy: +gregory.p.smith
versions: +Python 3.10 -Python 3.3

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