[issue18702] Report skipped tests as skipped

[Roundup Robot]

Roundup Robot added the comment:

New changeset 0d8f0526813f by Serhiy Storchaka in branch '2.7':
Fix test_os (issue #18702).
http://hg.python.org/cpython/rev/0d8f0526813f

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue18702>
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