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 funcGLib.unichar_iszerowidth and is at best misnamed.
a Unicode character
true if ch is a zero-width character, false otherwise
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 funcGLib.unichar_iszerowidth and is at best misnamed.