bug#9054: [External] : bug#9054: 24.0.50; show source in other window

[Eli Zaretskii]

> From: Drew Adams <drew.adams@oracle.com>
> CC: "larsi@gnus.org" <larsi@gnus.org>,
>         "9054@debbugs.gnu.org"
>       <9054@debbugs.gnu.org>
> Date: Wed, 22 Sep 2021 16:09:18 +0000
> 
> >> All I do is check whether there is such a thing-at-point.
> >> If not, I don't enable the menu item for acting on that
> >> kind of thing-at-point.
> > 
> > If the thing-at-point is nowhere defined, its context
> > menu should not show an entry for going to the
> > definition of the thing-at-point.
> 
> The choice between :visible and :enable is just that:
> a choice.  Do what you want.

That's not the issue at hand, because the time it takes to decide
whether a menu item should be :enable'd is as long as the time it
takes to decide whether it should be :visible.  That time _is_ the
issue.