[docs] [issue34329] Document how to remove a suffix with pathlib.Path.with_suffix

[Stéphane Wirtel]

Stéphane Wirtel <stephane at wirtel.be> added the comment:

Good catch, thank you.
Could you sign the CLA, without the CLA, we can't process your PR.

Thank you

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nosy: +matrixise

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue34329>
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