bug#51062: Customizable window resizing

[Juri Linkov]

>> Strange, when I tested the patch that you sent to emacs-devel,
>> it worked correctly.  But after you applied the patch on master,
>> it doesn't work.  I'm trying to debug why (window-height . nil)
>> has no effect on Help buffers.
>
> Indeed.  I probably tried to optimize it before pushing.  Should be
> fixed now.

Thanks, I confirm it's working now.

>>> But if 'display-buffer' is not involved, there isn't much we
>>> can do.  Maybe something like 'display-buffer-same-window' _after_
>>> putting the buffer into the selected window, but this might not be 100%
>>> compatible.  Certainly not for Emacs 28.
>>
>> This is a good idea to try.  But not sure how this is possible to use in
>> vc-run-delayed that is called when the buffer was already displayed long ago.
>
> The problem is rather that 'display-buffer' wasn't used in the first
> place to show the buffer.  Two things we could try to cover buffers that
> are shown via 'set-window-buffer' are
>
> - Invent a new buffer-local variable, say 'inhibit-temp-buffer-resize'
>   with the obvious meaning.
>
> - Invent a new window parameter 'inhibit-temp-buffer-resize' with the
>   obvious meaning.

Earlier I proposed to add a new hook whose default value contains
shrink-window-if-larger-than-buffer, so it can easily be removed from the hook.