[issue8533] regrtest: use backslashreplace error handler for stdout

[Hirokazu Yamamoto]

Hirokazu Yamamoto <ocean-city at m2.ccsnet.ne.jp> added the comment:

I noticed fd must be dup-ed before passing to io.open.
And I noticed direct test run like "py3k -m test.test_time"
still produces unicode error. (Maybe this is reasonable
limitation)

I can confirm we can suppress the unicode error in such
case with newly attached patch. "py3k_also_no_unicode_error_on_direct_test_run.patch"

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Added file: http://bugs.python.org/file19170/py3k_also_no_unicode_error_on_direct_test_run.patch

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<http://bugs.python.org/issue8533>
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