[issue26331] Tokenizer: allow underscores for grouping in numeric literals

[Petr Viktorin]

Petr Viktorin added the comment:

Regarding the patch: if trailing underscores are not allowed, `0 if 1_____else 1` should be illegal.

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nosy: +encukou

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue26331>
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