bug#35860: Delayed window positioning after buffer display

[Eli Zaretskii]

> From: Juri Linkov <juri@linkov.net>
> Date: Wed, 22 May 2019 23:32:13 +0300
> 
> There are commands that set point while the buffer is not displayed,
> and after displaying the buffer point remains at an old position,
> not where it was moved while the buffer was undisplayed.

That's a feature, isn't it?  See switch-to-buffer-preserve-window-point.

> One solution is to generalize the variable 'help-window-point-marker'
> currently described as:
> 
>   ;; `help-window-point-marker' is a marker you can move to a valid
>   ;; position of the buffer shown in the help window in order to override
>   ;; the standard positioning mechanism (`point-min') chosen by
>   ;; `with-output-to-temp-buffer' and `with-temp-buffer-window'.
>   ;; `with-help-window' has this point nowhere before exiting.  Currently
>   ;; used by `view-lossage' to assert that the last keystrokes are always
>   ;; visible.
>   (defvar help-window-point-marker (make-marker)
>     "Marker to override default `window-point' in help windows.")

Why not bind switch-to-buffer-preserve-window-point to nil instead?