[issue18814] Add codecs.convert_surrogateescape to "clean" surrogate escaped strings

[Nick Coghlan]

Nick Coghlan added the comment:

Oh, and yes, I agree a python-dev discussion would be a good idea.

>From my perspective, "rehandle_surrogateescape" is the key function for making it easier to check for malformed input data from operating system interfaces.

The other items I don't personally have a use case for, but they seem potentially valuable in make some key Unicode concepts a bit more discoverable.

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<http://bugs.python.org/issue18814>
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