Need a mapping for minus sign

[ds26gte]

A mapping for

U+2212 MINUS SIGN

is probably too basic to leave out.

[perey]

This was added to the defaults for the en_US.UTF-8 locale in November 2022 with commit mirror/libX11@6baccba. So this is probably no longer needed.

The sequence is Compose, - (hyphen-minus), _ (underscore).

(Unfortunately it doesn’t work for me, possibly because my locale is en_AU.UTF-8. But that’s a different issue.)