bug#16993: advice-add hides docstring

[Stefan]

> Some advice-add'ed functions lose their docstring. Current examples
> from "emacs -Q" include `insert-directory', `rename-buffer' and
> `create-file-buffer'.

I installed a workaround for these.

> the around advice info
>   :around advice: `ses--advice-yank'
> isn't font-locked as it is in other cases.

I think this will have to wait for 24.5 to be fixed :-(


        Stefan