bug#44080: 27.1; Display behavior of overlays `after-string` in resizable minibuffer frames

[Clemens]

>  > I did not know `resize-mini-frames` is already allowed to be a
>  > function, I don't use that feature at all so I'm a bit clueless about
>  > possible settings. It doesn't look like `window--resize-mini-frame` is
>  > called anywhere? Is that function meant for users?
>
> Yes.  For example with my Emacs 27 it's documented as

I was referring to the `window--resize-mini-frame` which I couldn't find
any calls for.

> Could you try coding it?  It's straightforward and you could test it
> immediately and possibly discuss it with the 'mini-frame-mode' people.

I can do it but I'm not so familiar with the Emacs development workflow 
myself. In this case I would clone the latest Emacs and then export my 
changes as a patch and send them here right?