Fix a warning due to misquoted function.

elisp/settings.el

@@ -79,7 +79,7 @@
 
 ;; Removes *Completions* from buffer after you've opened a file.
 (add-hook 'minibuffer-exit-hook
-      '(lambda ()
+          #'(lambda ()
               (let ((buffer "*Completions*"))
                 (and (get-buffer buffer)
                      (kill-buffer buffer)))))