[docs] [issue29133] Minor inaccuracy in shlex.shlex punctuation_chars example

[Evan]

Evan added the comment:

Sorry for not being more clear in the original report - the error is in the code, not in the output. The old behavior is punct=False, the new is punct=True.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue29133>
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