linux-kernel - diffs in changelogs

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Date:	Thu, 11 Jun 2015 13:40:06 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Joe Perches <joe@...ches.com>
Cc:	linux-kernel@...r.kernel.org
Subject: diffs in changelogs

People often put diff snippets in changelogs.  This causes problems
when one tries to apply a file containing both the changelog and the
diff because patch(1) tries to apply the diff which it found in the
changelog.

eg, something like

	git show d24a6e1087030b6da | patch -p1

will go haywire.

So can we please have a checkpatch test warning people away from doing
this?

patch(1) seems to be really promiscuous in its detection of a patch.  I
haven't had much success searching for "^--- " and similar.  What works
best for me is searching for "^[whitespace]@@ -".

Thanks.
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