[tyilo]

What is the expected output of padding "﷽"? It is only one code point but very wide.

[mmis1000]

There is a definition file on unicode spec about a character should be n half-width in monospacr context. Not sure if it includes all symbol though. Also don't know if it handles symbol that has more than 2 half-width

https://www.unicode.org/reports/tr11/