[issue19934] collections.Counter.most_common does not document `None` as acceptable input.

[Roundup Robot]

Roundup Robot added the comment:

New changeset df708898f27b by Raymond Hettinger in branch '2.7':
Issue #19934:  Document *None* as an acceptable input to Counter.most_common([n])
https://hg.python.org/cpython/rev/df708898f27b

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue19934>
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