Retire the 'Ambiguous-width characters: Wide' option
In #2655 (comment 1856843) @chpe wrote:
As far as the ambiguous-width property is concerned, I think it's actually time to remove it. It's a relict of the bygone ECMA-35 era, and we removed ECMA-35 support a long time ago (keeping only the DEC drawing charset support, IIRC because ncurses has no way tell it not to use it, apart from setting TERM to undesirable values).
Further interesting reading is vte/doc/ambiguous.txt, a file which should also be updated or removed if retiring this feature. It talks about ISO-2022 which was removed from VTE a long time ago. I'm not sure if manually choosing a legacy CJK encoding still has or should have an effect on the width.