May I kindly remind of https://cygwin.com/ml/cygwin/2017-07/msg00366.html,
for which my patch proposal is still pending on the newlib mailing list?
While it's not as urgent anymore for mintty, where I've introduced a
native width option meanwhile (Charwidth, corresponding to xterm
-mk_width), it's not the best way to tune character width as it makes it
inconsistent with wcwidth; also other applications might benefit from
the option to update wcwidth seamlessly with each Unicode version.
Thomas
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