[issue18713] Enable surrogateescape on stdin and stdout when appropriate

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

The surrogateescape error handler works only with UTF-8.

As a side effect of this change an input from stdin will be incompatible in general with extensions which implicitly encode a string to bytes with UTF-8 (e.g. tkinter, XML parsers, sqlite3, datetime, locale, curses, etc.)

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nosy: +serhiy.storchaka

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<http://bugs.python.org/issue18713>
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