[issue15415] Add temp_dir() and change_cwd() to test.support

[Roundup Robot]

Roundup Robot added the comment:

New changeset 4f0034477ba9 by Nick Coghlan in branch '3.3':
Close #15415: Factor out temp dir helpers to test.support
http://hg.python.org/cpython/rev/4f0034477ba9

New changeset b20a10c97e08 by Nick Coghlan in branch 'default':
Merge #15415 from 3.3
http://hg.python.org/cpython/rev/b20a10c97e08

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nosy: +python-dev
resolution:  -> fixed
stage: patch review -> committed/rejected
status: open -> closed

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue15415>
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