Change the name of OLD-NAME bookmark to NEW-NAME name.
If called from keyboard, prompt for OLD-NAME and NEW-NAME.
If called from menubar, select OLD-NAME from a menu and prompt for NEW-NAME.
If called from Lisp, prompt for NEW-NAME if only OLD-NAME was passed
as an argument. If called with two strings, then no prompting is done.
You must pass at least OLD-NAME when calling from Lisp.
While you are entering the new name, consecutive C-w's insert
consecutive words from the text of the buffer into the new bookmark
name. (fn OLD-NAME &optional NEW-NAME)