bug#68547: [PATCH] ; Fix 'mode-line-format-right-align' with ElDoc

[João Távora]

On Sat, Jan 20, 2024 at 9:57 AM Eli Zaretskii <eliz@gnu.org> wrote:
>
> > Date: Wed, 17 Jan 2024 20:44:04 +0100
> > From:  Eshel Yaron via "Bug reports for GNU Emacs,
> >  the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>
> >
> > Tags: patch
> >
> > The new mode line right alignment requires setting `mode-line-format` to
> > a list that contains (as in `memq`) the symbol
> > `mode-line-format-right-align`.  This is a bit brittle, and currently
> > `eldoc-minibuffer-message` modifies `mode-line-format` in a way that
> > happens to break `mode-line-format-right-align`.  To see that, set
> > `mode-line-format` to '("" mode-line-format-right-align "foo bar") and
> > then type `M-: (list`.  Now ElDoc info appears on the mode line, but
> > "bar" is no longer visible.
> >
> > This patch makes ElDoc modify `mode-line-format` in an equivalent way
> > that avoids messing with `mode-line-format-right-align`.
>
> Thanks.
>
> João, any objections or comments?

I think it looks good.  I just think the patch is a little
too newline friendly, i.e. the if can probably fit in a single
line without reaching 80 columns and it'll make it easier to
read.

João