[issue18679] include a codec to handle escaping only control characters but not any others

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

ast.literal_eval("'%s'" % e)
e.encode().decode('unicode-escape').encode('latin1').decode()
e.encode('latin1', 'backslashescape').decode('unicode-escape')

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nosy: +serhiy.storchaka

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue18679>
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