Lars Ingebrigtsen <larsi@gnus.org> writes:

> Eli Zaretskii <eliz@gnu.org> writes:
>
>> jit-lock-mode is not a minor mode, so the usual syntax doesn't work
>> with it, and isn't documented to work.  Set it to nil to disable.
>
> The doc string could do with some explicit text about this, so I've
> added that to Emacs 29.  But since this is working as intended, I'm
> closing this bug report.

Thanks! It certainly improves the situation.
However, I am confused why it is impossible to follow +1/-1 convention.
Looking through jit-lock.el I do not see any place where any value other
than non-nil/nil is considered.

A possible patch is attached.

Best,
Ihor