[issue11395] print(s) fails on Windows with long strings

[Amaury Forgeot d'Arc]

Amaury Forgeot d'Arc <amauryfa at gmail.com> added the comment:

On Windows, isatty() is a cheap call: a simple lookup in the _ioinfo structure.  And dup2() can still change the destination of a file descriptor, so the new attribute can be out of sync...
I suggest to call isatty() on every write.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue11395>
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