bug#30610: clarify linux-mode usage from Lisp

[John Shahid]

Agreed. I like your proposed solution more. do you have patch or is that
something I can work on ?

Glenn Morris <rgm@gnu.org> writes:

> There are loads of these "Toggle..." doc-strings, all using the same
> format. It doesn't make sense to change just the linum one.
>
> (https://debbugs.gnu.org/10754 would reduce the need to change multiple
> places in future.)