[issue12721] Chaotic use of helper functions in test_shutil for reading and writing files

[Roundup Robot]

Roundup Robot <devnull at psf.upfronthosting.co.za> added the comment:

New changeset d52a1199d3f0 by Éric Araujo in branch 'default':
Clean up test_shutil, to facilitate upcoming improvements (#12721).
http://hg.python.org/cpython/rev/d52a1199d3f0

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nosy: +python-dev

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue12721>
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