New submission from INADA Naoki <songofaca...@gmail.com>:

Currently, strings.Template uses re.IGNORECASE without re.ASCII:

    idpattern = r'[_a-z][_a-z0-9]*'
    flags = _re.IGNORECASE

[a-z] matches against 'ı' (0x131, DOTLESS I) and 'ſ' (0x17f, LONG S).
It is not intentional, and it makes re.compile slower.

----------
components: Regular Expressions
messages: 303596
nosy: ezio.melotti, inada.naoki, mrabarnett
priority: normal
severity: normal
status: open
title: string.Template should use re.ASCII flag
versions: Python 3.7

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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue31672>
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