[issue27818] Speed up number format spec parsing

[Roundup Robot]

Roundup Robot added the comment:

New changeset 9bddf9e72c96 by Serhiy Storchaka in branch 'default':
Issue #27818: Speed up parsing width and precision in format() strings for
https://hg.python.org/cpython/rev/9bddf9e72c96

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nosy: +python-dev

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue27818>
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