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From: Glenn Morris <rgm@gnu.org>
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Subject: Re: bad interaction of face-spec-set and customize-face
Date: Mon, 03 Mar 2008 04:11:24 -0500
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Richard Stallman wrote:

> I did not finish rationalizing this whole area.  In particular, it is
> not clear how `set-face-attribute' should interact with
> `face-spec-set' and with Custom.  This needs more thinking.

It seems odd to me, but I haven't thought about it and don't really
want to.

It does as you say need more work (and documenting); eg at the moment,
customize happily tells you "Set for current session" despite the fact
that no change has been applied.