From mboxrd@z Thu Jan  1 00:00:00 1970
From: Junio C Hamano <gitster@pobox.com>
Subject: Re: question: how to ignore extral CR when diff dos format files
 with 'color=auto'
Date: Tue, 26 Aug 2008 21:54:51 -0700
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To: goooguo <erwangg@fortemedia.com.cn>
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goooguo <erwangg@fortemedia.com.cn> writes:

> git-diff prints "^M" at each end of line for dos format files when
> 'color=auto'.
>
> it's annoying!

"man git-config" and learn about core.whitespace perhaps?