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List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Original-Sender: "Emacs-devel" Xref: news.gmane.org gmane.emacs.devel:239323 Archived-At: > This can only work if we assume users will want the same attribute be > extended or not irrespective of the face. Such an assumption is not > necessarily valid: users could want the hl-line face, for example, be > always extended, regardless of its attributes, but would like at the > same time not see other faces' :underline attribute extended. Reiterating what I said elsewhere (and hoping not to bore anyone with my ideas): With the face-based approach the user would have to set background, underline and extend for the highlight face to get that behavior. With the attributes-based approach, a user would have to include highlight both in 'extend-background' and 'extend-underline'. martin