From mboxrd@z Thu Jan  1 00:00:00 1970
From: Steven Grimm <koreth@midwinter.com>
Subject: Re: [PATCH] Teach git-mergetool about Apple's opendiff/FileMerge
Date: Thu, 22 Mar 2007 21:52:27 -0700
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Cc: Arjen Laarhoven <arjen@yaph.org>, tytso@mit.edu,
	git@vger.kernel.org
To: Junio C Hamano <junkio@cox.net>
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Junio C Hamano wrote:
>> +                opendiff $LOCAL $REMOTE -merge $path | cat
> What's the purpose of this cat anyway?  It looks like an
> expensive no-op to me.
>   

If stdout is a tty, opendiff appears to background itself automatically. 
I assume he wanted to prevent that without losing any output from the 
command.

-Steve