From: Aaron Schrab <aaron@schrab.com>
Date: Fri, 26 Oct 2012 21:26:50 GMT
Subject: Strange behaviour of git diff branch1 ... branch2
Message-ID: <20121026212650.GB2612@pug.qqx.org>

I came across this odd question on stackoverflow:
	http://stackoverflow.com/q/13092854/1507392


If git diff is run with "..." as a separate argument between two 
commit-ish arguments causes it to produce strange output.  The 
differences seem to be the same as if "..." was left out, but change 
lines begin with 4 + or - characters rather than just 1.

Can anybody explain what is happening here?  I don't have any reason to 
want to use that form myself, but I'm very curious about why it produces 
this odd output.

Thanks.