>     Ah, that makes sense. But doesn't help us plebs who have no idea which
>     marks belong to a script.
>
> https://www.unicode.org/Public/UNIDATA/Scripts.txt

That table is instructive but TL;DR for plebs.

>     ascii-other? is reasonable. I thought of ascii-weird? :)
>
>     How about ascii-mark? Probably parentheses are not "marks".
>
> No, in Unicode "mark" means "diacritical mark", so let's avoid that too.

Good point.

>     I tried to look in the thesaurus but can't find any good alternatives.
>     Ideas?
>
> Unfortunately I don't.

After sleeping on it for a few more nights, I'm leaning toward
`ascii-other-graphic?`. IMOH it doesn't look terrible when you add up
all the predicates:

* ascii-control?

* ascii-space-or-tab?
* ascii-whitespace?

* ascii-upper-case?
* ascii-lower-case?
* ascii-alphabetic?
* ascii-numeric?
* ascii-alphanumeric?
* ascii-other-graphic?