[docs] [issue31110] Small typo in plistlib docs

[cwee]

cwee added the comment:

Just noticed the note was removed in commit edef358ed6d in the latest 3.7 docs. Closing issue.

Thanks for the intro on how to contribute though!

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resolution:  -> out of date
stage: needs patch -> resolved
status: open -> closed

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue31110>
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