[issue22609] Constructors of some mapping classes don't accept `self` keyword argument

[Roundup Robot]

Roundup Robot added the comment:

New changeset 3dfe4f0c626b by Serhiy Storchaka in branch '2.7':
Issue #22609: Constructors and update methods of mapping classes in the
https://hg.python.org/cpython/rev/3dfe4f0c626b

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue22609>
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