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From: Junio C Hamano <gitster@pobox.com>
Subject: Re: [PATCH] Add test case for ls-files --with-head
Date: Wed, 03 Oct 2007 14:47:01 -0700
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To: Johannes Schindelin <Johannes.Schindelin@gmx.de>
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In-Reply-To: <Pine.LNX.4.64.0710032238080.28395@racer.site> (Johannes
	Schindelin's message of "Wed, 3 Oct 2007 22:39:48 +0100 (BST)")
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Johannes Schindelin <Johannes.Schindelin@gmx.de> writes:

>> $ for i in {1,2,3,4,5}{0,1,2,3,4,5,6,7,8,9}; do echo $i; done
>> {1,2,3,4,5}{0,1,2,3,4,5,6,7,8,9}
>> $
>
> AFAIK this is the same as bash (I thought I was the last one to make that 
> mistake 10 years ago).  As long as you do not have _files_ matching the 
> pattern, it does not expand.  And besides, this is too complicated anyway: 
> [1-5] is much shorter than {1,2,3,4,5}.

AFAIK, you are wrong ;-)

{1,2,3,4,5} expands regardless of what's on the filesystem but I
do not think it is POSIX.

[1-5] matches if any of the {1,2,3,4,5} is found on the
filesystem.