drop ambiguous-wide behaviour from Unicode CJK locales

Thomas Wolff towo@towo.net
Sat Oct 10 17:20:51 GMT 2020

It seems that ambiguous-wide behaviour (i.e. double-width property for 
characters in the East Asian Ambiguous width category) for CJK locales 
with UTF-8 encoding is inconsistent with Linux locale definitions.
I've sent a patch to the newlib list that changes that. Characters like 
─ ü æ are no longer wide in the following locales:
but only in ja, ko, zh locales with legacy encoding. Explicit modifiers 
@cjkwide and @cjknarrow are not affected.

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