From a52f572f1e4e726168be7dfbca9219c3e90b51be Mon Sep 17 00:00:00 2001
From: Ingo Schommer <ingo@silverstripe.com>
Date: Fri, 15 Oct 2010 01:38:52 +0000
Subject: [PATCH] BUGFIX: Prevent DataDifferencer from creating empty <ins />
 and <del /> takes that confuse the browser. (from r104675)

git-svn-id: svn://svn.silverstripe.com/silverstripe/open/modules/cms/trunk@112458 467b73ca-7a2a-4603-9d3b-597d59a354a9
---
 code/Diff.php | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/code/Diff.php b/code/Diff.php
index b7c5f9d9..708cc814 100755
--- a/code/Diff.php
+++ b/code/Diff.php
@@ -686,6 +686,10 @@ class Diff
 			$doc = new SS_HTMLValue($content);
 			$content = $doc->getContent();
 		}
+
+		// Remove empty <ins /> and <del /> tags because browsers hate them
+		$content = preg_replace('/<(ins|del)[^>]*\/>/','', $content);
+
 		return $content;
 	}