Re: Elisp manual node Face Attributes: Emacs 21 -> Emacs 22?

[Richard Stallman]

    "In Emacs 21, any attribute in a face can have the value
    `unspecified'.  This means the face doesn't specify that attribute.  In
    face merging, when the first face fails to specify a particular
    attribute, that means the next face gets a chance.  However, the
    `default' face must specify all attributes."

I don't see that text in the Lisp manual sources.
However, we should search for any other problems of this sort.

Thanks.