bug#29478: [Patch] bug#29478: 26.0.90; `C-h k' followed by mouse clicks no longer shows down event

[Eli Zaretskii]

> From: Stefan Monnier <monnier@IRO.UMontreal.CA>
> Cc: acm@muc.de, 29478@debbugs.gnu.org, npostavs@users.sourceforge.net
> Date: Mon, 29 Jan 2018 16:54:09 -0500
> 
> > It means I'm okay with this:
> >
> >   FOO is undefined
> >
> > but prefer not to see the second line in this:
> >
> >   FOO at that spot runs BAR
> >   down-FOO at that spot is undefined
> 
> OK, in help--filter-info-list in the patch below I follow the rule of
> getting rid of all `undefined` keys except when there are only undefined
> keys in which case I keep the last one (e.g. the triple-mouse-N).

Thanks.