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From: "Richard M. Stallman" <rms@gnu.org>
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Subject: What does it mean?
Date: Sat, 01 Nov 2008 21:53:27 -0400
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I saw this doc string go by in the diff log

+  "Face used for variables or faces comment tags."

and realized it is not grammatical and I cannot parse it.
Does anyone know what that face is actually used for?