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

[STINNER Victor]

STINNER Victor added the comment:

Oh, test_regrtest still fails on x86 Windows XP VS9.0 2.7.

0:16:29 [283/402/1] test_regrtest failed
test test_regrtest failed -- multiple errors occurred; run in verbose mode for details

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue30283>
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