Re: defcustom :version

[Richard Stallman]

    `M-x customize-changed RET 21.4 RET' is supposed to show the user all
    defcustoms that were added, or whose standard value changed, in Emacs
    22.1.  That is the main purpose of the :version keyword.  Of course,
    the fact that you get a 2811 line long Custom buffer limits the
    usefulness of this feature.

When a group is new, what does it do?  Include all the options in
that package, or include one item for that group?