[issue24665] CJK support for textwrap

[INADA Naoki]

INADA Naoki added the comment:

Sorry, I'm not unicode expert.

Important usage of textwrap is printing in terminal.
So I think we should learn from software relating terminal.

tmux uses utf8proc.  utf8proc calculates display width by script at here.
https://github.com/JuliaLang/utf8proc/tree/master/data

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nosy: +inada.naoki

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<http://bugs.python.org/issue24665>
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