[issue30283] [2.7] Backport test_regrtest (partially) on Python 2.7

[STINNER Victor]

STINNER Victor added the comment:

Serhiy Storchaka: "Could you add a Misc/NEWS entry about backported regrtest features?"

Oh, I don't really consider that regrtest is part of "Python", but sure, I can document my changes in NEWS. I reopen the issue to not forget.

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resolution: fixed -> 
status: closed -> open

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<http://bugs.python.org/issue30283>
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