(list-buffers, ctl-x-map): Mark the entry points with ;;;###autoload cookies.

lisp/buff-menu.el

@@ -638,8 +638,10 @@ The current window remains selected."
   (view-buffer-other-window (Buffer-menu-buffer t)))
 
 
+;;;###autoload
 (define-key ctl-x-map "\C-b" 'list-buffers)
 
+;;;###autoload
 (defun list-buffers (&optional files-only)
   "Display a list of names of existing buffers.
 The list is displayed in a buffer named `*Buffer List*'.