[docs] [issue16206] dict() docs should display multiple signatures

[Roundup Robot]

Roundup Robot added the comment:

New changeset 5fc6f47974db by Chris Jerdonek in branch '2.7':
Issue #16206: Backport dict documentation improvements from 3.2.
http://hg.python.org/cpython/rev/5fc6f47974db

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue16206>
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