[issue24932] Use proper command line parsing in _testembed

[Steve Dower]

Steve Dower added the comment:

Patch committed without modification. I'll keep an eye on the buildbots just in case, though I may end up going offline before they get to this changeset.

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assignee:  -> steve.dower
stage:  -> commit review

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue24932>
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