isZeroWidth
Checks if a character that should not be normally rendered.
This includes all Unicode characters with "ZERO WIDTH" in their name, as well as bidi formatting characters, and a few other ones.
This is totally different from func@GLib.unichar_iszerowidth and is at best misnamed.
Return
true if @ch is a zero-width character, false otherwise
Since
1.10
Parameters
ch
a Unicode character