[Emacs] Demand multi-line

This hacks around https://github.com/IvanMalison/multi-line/issues/8.

dotfiles/emacs.d/README.org

@@ -2049,6 +2049,8 @@ I don't use auto-complete at all, so I have set up a hook to automatically disab
 ** multi-line
 #+BEGIN_SRC emacs-lisp
 (imalison:use-package multi-line
+  ;; Demand multi-line to avoid failre to load mode specific strategies
+  :demand t
   :bind ("C-c d" . multi-line)
   :config
   (progn