[docs] [issue35168] shlex punctuation_chars inconsistency

[Roundup Robot]

Change by Roundup Robot <devnull at psf.upfronthosting.co.za>:


----------
keywords: +patch, patch, patch, patch
pull_requests: +11400, 11401, 11402, 11403
stage: needs patch -> patch review

_______________________________________
Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue35168>
_______________________________________