bug#37053: 26.2; window.el does not (provide 'window)

[Noam Postavsky]

>> (use-package window
>>   :custom (split-height-threshold nil "Minimum height for splitting windows 
>> sensibly."))
>
> For builtin variables like this, you can just do
>
> (use-package emacs
>    :custom (split-height-threshold nil "Minimum height for splitting windows 
> sensibly."))

Oh, (use-package "window" ...) should work as well.  See also
https://debbugs.gnu.org/25026 for a similar report about isearch.el.