bug#56974: 29.0.50; Missing documentation for former subr-x macros

[Lars Ingebrigtsen]

Michael Heerdegen <michael_heerdegen@web.de> writes:

> Personally I don't care that much, both names are equally good (or bad).
> I would make them synonymous.  Although when-let and and-let are already
> synonymous names...

There may be code problems in making when-let* and when-let synonymous
(for those that are using the outdated forms), so that's not easy to do.
But since we shouldn't document the differences, they're identical in
that way.