[docs] [issue18326] Mention keywork only in list.sort docs

[Terry J. Reedy]

Changes by Terry J. Reedy <tjreedy at udel.edu>:


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title: Not Clear Docs -> Mention keywork only in list.sort docs
type:  -> enhancement

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue18326>
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