bug#29272: 26.0.90; "C-h k C-mouse-3" followed by menu selection asks for more keys

[Eli Zaretskii]

> Date: Sun, 19 Nov 2017 19:04:45 +0200
> From: Eli Zaretskii <eliz@gnu.org>
> Cc: 29272@debbugs.gnu.org
> 
> OK, but I still would like to understand where did that "translation"
> come from.  I don't think I get that from the above description.

Specifically, can you walk me through help-key-description, and tell
what values do you see there.  For example, where did mouse-1 come
from, if the original mouse click was C-mouse-3?  Isn't that the root
cause?