[issue39079] help() modifies the string module

[Mark Dickinson]

Mark Dickinson <dickinsm at gmail.com> added the comment:

Here's where `string.letters` is reassigned: https://github.com/python/cpython/blob/5f2c1345a79f205c680ed6e0a6ed44199546d79e/Modules/_localemodule.c#L136-L147

That code looks like it's exercised whenever setlocale is (or possibly just when LC_CTYPE is changed). I haven't yet figured out which part of the help machinery causes that.

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