Re: emacs-28 a866674b2a: Fix inaccuracies in "lax search" documentation

[Juri Linkov]

> Also, we do have describe-key and describe-bindings, which are two
> separate commands that produce very different outputs.  It would be
> okay to have 2 separate commands here as well, but AFAIU that was not
> your proposal.

My proposal is to have one command that depending on the prefix argument
will either show equivalences of all characters, or will read a character
name to display its equivalences only.