[issue29349] Update old Python 2 code in Docs/tools/extensions/patchlevel.py

[Roundup Robot]

Roundup Robot added the comment:

New changeset ecdc864884a9 by Martin Panter in branch '3.5':
Issue #29349: Fix Python 2 syntax in documentation build code
https://hg.python.org/cpython/rev/ecdc864884a9

New changeset cdcb33f37bf3 by Martin Panter in branch '3.6':
Issues #29349: Merge Py 2 fix 3.5
https://hg.python.org/cpython/rev/cdcb33f37bf3

New changeset db8b917bbfdd by Martin Panter in branch 'default':
Issues #29349: Merge Py 2 fix 3.6
https://hg.python.org/cpython/rev/db8b917bbfdd

New changeset ca7d2af9920e by Martin Panter in branch 'default':
Issues #29349: Add NEWS for 3.7; use “with” statement
https://hg.python.org/cpython/rev/ca7d2af9920e

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nosy: +python-dev

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<http://bugs.python.org/issue29349>
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