bug#43519: 28.0.50; Overlay at end of minibuf hides minibuf's real content

[Gregory Heytings]

> > > > > Maybe such a change in behavior is desirable (I'm not sure, and I 
> > > > > don't yet have a clear idea how will Lisp programs decide which 
> > > > > behavior to request), but it's a separate issue.
> > > >
> > > > Okay, so shall I file another bug just to have this same discussion 
> > > > again?
> > >
> > > Yes, please.
> >
> > But you already told me that you will be opposed to such a change...
>
> Yes, but I can be convinced to change my mind, if there are good 
> reasons.  Other people might chime in and provide such reasons.

Done.  I'm curious to see whether this will lead to something.