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Since the xdiff library was not originally part of Git, it does its own system includes. Let's instead use git-compat-util, which has two benefits: 1. It adjusts for any system-specific quirks in how or what we should include (though xdiff's needs are light enough that this hasn't been a problem in the past). 2. It lets us use wrapper functions like xmalloc(). Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
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