bug#48257: [kisara.moe] Re: [kisara.moe] Re: bug#48257: [kisara.moe] 28.0.50; Align to right doesn't account for window separator in terminal frames

[mohkale]

Eli Zaretskii <eliz@gnu.org> wrote:

> > Date: Thu, 06 May 2021 17:16:53 +0200
> > From: mohkale@kisara.moe
> > 
> > On terminal frames emacs doesn't account for the window separator when
> > right aligning some text.
> 
> Only in the mode line, or also in the window's text area?
> 
> Your recipe only affects the mode line.
> 
> Thanks.

I haven't encountered the issue in regular windows (at least not that I can 
recall).
I have encountered something similair when using selectrums new 
group-title-format.
where there's a $ shown on the right hand fringe because the input is too long 
but
that may be unrelated.

```lisp
(selectrum-mode +1)
(completing-read "foo: "
                 (cl-loop for i from 1 to 10
                          collect (concat
                                    #("    " 0 4 (face (:strike-through t)))
                                    #(" hello ")
                                    #(" " 0 1 (face (:strike-through t) display 
(space :align-to right))))))
```

I believe selectrum renders completion candidates onto a virtual buffer so 
maybe this
is an example of what you described.