[issue19600] Use specific asserts in distutils tests

[Ezio Melotti]

Changes by Ezio Melotti <ezio.melotti at gmail.com>:


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assignee:  -> serhiy.storchaka
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/issue19600>
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