bug#62207: 29.0.60; Trying to remove non-existent key binding instead adds a binding

[Stefan Monnier]

>     Jonas> As a side-note, it would be nice if it were possible to lookup a
>     Jonas> key in a keymap only, while ignoring bindings in its parent keymap.

Could you explain why you need `keymap-unset-key` and why you need to
lookup "all but the ignore the parent"?

I'm curious because the meaning of these can be subtly more complex than
meets the eye once you consider things like `make-compose-keymap`.

> A feature request and a bug report? Tsk ;-) Luckily the infrastructure
> is actually there already.

Hmm... if you need to add yet-another-arg to `Flookup_key`, than I'm not
sure it qualifies as "the infrastructure is actually there already."

BTW, `map-keymap-internal` could be another way to attack the problem
(it has other downsides, but it stops before entering the parents).


        Stefan