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From: Eli Zaretskii <eliz@gnu.org>
Newsgroups: gmane.emacs.devel
Subject: Re: What does Emacs on w32 know that grep can't figure out?
Date: Fri, 01 Oct 2010 09:34:13 +0200
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> Date: Fri, 01 Oct 2010 07:37:59 +0200
> From: "Jan D." <jan.h.d@swipnet.se>
> Cc: Lennart Borgman <lennart.borgman@gmail.com>,
> 	Emacs-Devel devel <emacs-devel@gnu.org>
> 
> GNU grep understands UTF-8 I think.

Not really.  Grep just compares bytes one by one, it knows nothing
about multibyte characters.