Unicode 11.0.0: BidiMirroring.txt

[Marcel Schneider via Unicode]

In the wake of the new release, may we discuss the reason why UTC persisted in 
recommending that 3 pairs of mathematical symbols featuring tildes are mirrored 
in low-end support by glyph-exchange bidi-mirroring, with the result that legibility 
of tildes is challenged, as demonstrated for “Remedial 11” in:

https://www.unicode.org/L2/L2017/17438-bidi-math-fdbk.html

(This was written up for meeting #153, while an outdated alias file with roughly 
same content was discussed again at meeting 154, while there were also some 
related items in the general feedback hopper.)

Thanks,

Marcel