bug#70213: Info-mode side window fit-window-to-buffer issue

[Stephen Berman via "Bug reports for GNU Emacs, the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>]

On Fri, 05 Apr 2024 08:04:28 -0700 Joseph Turner via "Bug reports for GNU Emacs, the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org> wrote:

> Eli Zaretskii <eliz@gnu.org> writes:
>
>> tags 70213 notabug
>> thanks
>>
>>> Date: Fri, 05 Apr 2024 01:57:13 -0700
>>> From:  Joseph Turner via "Bug reports for GNU Emacs,
>>>  the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>
>>>
>>> With emacs -Q on 29, evaluate:
>>>
>>> (setq display-buffer-alist
>>>       '(((derived-mode . Info-mode)
>>>          display-buffer-in-side-window
>>>          (side . right)
>>>          (window-width . fit-window-to-buffer))))
>>>
>>> Then press C-h i
>>>
>>> Expected: Info-mode buffer pops up in right side window.
>>>
>>> Actual: Info-mode buffer pops up in full frame.
>>>
>>> At this point, pressing C-h i once more does open a right side window.
>>>
>>> I haven't been able to reproduce this this issue with any other mode.
>>
>> I'm not interested in fixing this: Info is not intended to be run in a
>> side window.  For starters, the text of an Info file is not meant to
>> be displayed in narrow windows, and will look ugly at best.
>>
>> Don't do that!
>
> Okay, closing now.  What I had been doing is setting the side window with
> to 80 columns, which is plenty of space for most Info files.

FWIW, I get the expected result with your recipe on master (GNU/Linux,
Gtk3; I don't have emacs-29 at hand to test).

Steve Berman