bug#65411: 29.1; setopt of xref-after-jump-hook gives warning

[Eli Zaretskii]

> From: Howard Melman <hmelman@gmail.com>
> Date: Sun, 20 Aug 2023 11:03:50 -0400
> 
> 
> In Emacs 29.1 should I be able to do this:
> 
>     (setopt xref-after-jump-hook '(reposition-window xref-pulse-momentarily))
> 
> When I do in my init and then use xref-find-definition I get this warning:
> 
>     ⛔ Warning (emacs): Value `((reposition-window xref-pulse-momentarily))' 
> for `xref-after-jump-hook' does not match type hook

xref-pulse-momentarily is not an autoloaded function, and xref.el is
not preloaded.  You need to load xref.el, and then the above will
work; it does for me.