Re: problems with face-spec-reset-face and set-face-attribute

[Richard M. Stallman]

    `unspecified' does just what it says, i.e. leaves the default frame
    value untouched.  If you want to change the default for new frames,
    you can set the value of this attribute to nil.  So this should work
    just fine:

        (set-face-attribute 'completions-first-difference nil :inherit nil)

Drew, do you think something in the documentation is not clear enough
about this?  If you identify a place that is not clear, I can
improve it.