Re: [PATCH] Support "\n" in icomplete-separator

[Gregory Heytings]

> > > As mentioned in the original discussion: with a special text property 
> > > or overlay property on the first character of the text to be shown in 
> > > the mini-window.  The display engine will see that and heed it.
> >
> > Okay.  As mentioned in the original discussion, I volunteered to do 
> > that, but haven't heard from you since then.
>
> Thank you for volunteering.
>
> What do you need to hear beyond what I already said?

I would prefer to be sure that there is an agreement that your proposed 
solution (using a text property or an overlay property) is the way to go. 
AFAIU the discussion between you and Stefan in bug#43572 stopped before 
reaching such an agreement.