(:name undo-tree
       :description "Treat undo history as a tree"
       :type git
       :url "http://www.dr-qubit.org/git/undo-tree.git"
       :prepare (progn
                  (autoload 'undo-tree-mode "undo-tree.el"
                    "Undo tree mode; see undo-tree.el for details" t)
                  (autoload 'global-undo-tree-mode "undo-tree.el"
                    "Global undo tree mode" t)))