I noticed that there are quite a few UI glitches in vim-classic – and quickly found the cause: It comes with outdated Unicode tables.

I have to admit that I wasn’t aware that there’s a new Unicode release every year:

https://en.wikipedia.org/wiki/Unicode#Versions

Look at this huge number of changes. Every program has to keep track of that, often through libraries but sometimes not (like in Vim’s case).

I use Unicode extensively, but this shit is extremely expensive …

My TUI framework is having the same problem. At the moment, this is all offloaded to wcwidth, but if that library was to become unmaintained, I’d have to track Unicode myself.

Gah!

The DOS days were simpler. CP437, end of story. (Yes, I know that’s a lie.)