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From: Richard Stallman <rms@gnu.org>
Newsgroups: gmane.emacs.devel
Subject: Re: region-active-p
Date: Sat, 27 Oct 2007 19:41:47 -0400
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Xref: news.gmane.org gmane.emacs.devel:81898
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Thanks.  Now I understand what XEmacs does here.

I propose to add an optional argument NONEMPTY to region-active-p
which means "return nil if the region is empty".  How about it?