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From: Eli Zaretskii <eliz@gnu.org>
Newsgroups: gmane.emacs.devel
Subject: Re: Don't complain about changed file when it hasn't changed
Date: Tue, 30 Aug 2016 19:55:00 +0300
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To: Stefan Monnier <monnier@iro.umontreal.ca>
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In-reply-to: <jwvy43ew979.fsf-monnier+gmane.emacs.devel@gnu.org> (message from
	Stefan Monnier on Tue, 30 Aug 2016 11:48:16 -0400)
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> From: Stefan Monnier <monnier@iro.umontreal.ca>
> Date: Tue, 30 Aug 2016 11:48:16 -0400
> 
> > I see, thanks! I didn't realize that these functions needed widening.
> 
> AFAIK all functions normally can only operate within the
> current narrowing.  It's only when the reverse is true that it should
> be documented.

Indeed.