Re: problems with Emacs 28

[Stefan Monnier]

> Now this is the only error that remains. A Warning with `map-put'; an
> error with `map-put!' (after complying with the warning's piece of
> advice). (And again, what does the exclamation mark mean?)

It has just as much meaning as the `t` in `put`.
[ Except it follows the Scheme tradition of using a final ! in the name
  of functions which operate by side-effect. ]


        Stefan