diff --git a/html/includes/geshi/geshi/diff.php b/html/includes/geshi/geshi/diff.php
new file mode 100644
index 0000000000..e4bfc6f470
--- /dev/null
+++ b/html/includes/geshi/geshi/diff.php
@@ -0,0 +1,194 @@
+<?php
+/*************************************************************************************
+ * diff.php
+ * --------
+ * Author: Conny Brunnkvist (conny@fuchsia.se), W. Tasin (tasin@fhm.edu)
+ * Copyright: (c) 2004 Fuchsia Open Source Solutions (http://www.fuchsia.se/)
+ * Release Version: 1.0.8.12
+ * Date Started: 2004/12/29
+ *
+ * Diff-output language file for GeSHi.
+ *
+ * CHANGES
+ * -------
+ * 2008/05/23 (1.0.7.22)
+ *  -  Added description of extra language features (SF#1970248)
+ * 2006/02/27
+ *  -  changing language file to use matching of start (^) and end ($) (wt)
+ * 2004/12/29 (1.0.0)
+ *  -  First Release
+ *
+ * TODO (updated 2006/02/27)
+ * -------------------------
+ *
+ *
+ *************************************************************************************
+ *
+ *     This file is part of GeSHi.
+ *
+ *   GeSHi is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation; either version 2 of the License, or
+ *   (at your option) any later version.
+ *
+ *   GeSHi is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with GeSHi; if not, write to the Free Software
+ *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ ************************************************************************************/
+
+
+$language_data = array (
+    'LANG_NAME' => 'Diff',
+    'COMMENT_SINGLE' => array(),
+    'COMMENT_MULTI' => array(),
+    'CASE_KEYWORDS' => GESHI_CAPS_NO_CHANGE,
+    'QUOTEMARKS' => array(),
+    'ESCAPE_CHAR' => ' ',
+    'KEYWORDS' => array(
+            1 => array(
+                '\ No newline at end of file'
+            ),
+//            2 => array(
+//                '***************' /* This only seems to works in some cases? */
+//            ),
+        ),
+    'SYMBOLS' => array(
+        ),
+    'CASE_SENSITIVE' => array(
+        1 => false,
+//        2 => false
+        ),
+    'STYLES' => array(
+        'KEYWORDS' => array(
+            1 => 'color: #aaaaaa; font-style: italic;',
+//            2 => 'color: #dd6611;',
+            ),
+        'COMMENTS' => array(
+            ),
+        'ESCAPE_CHAR' => array(
+            0 => ''
+            ),
+        'BRACKETS' => array(
+            0 => ''
+            ),
+        'STRINGS' => array(
+            0 => ''
+            ),
+        'NUMBERS' => array(
+            0 => ''
+            ),
+        'METHODS' => array(
+            0 => ''
+            ),
+        'SYMBOLS' => array(
+            0 => ''
+            ),
+        'SCRIPT' => array(
+            0 => ''
+            ),
+        'REGEXPS' => array(
+            0 => 'color: #440088;',
+            1 => 'color: #991111;',
+            2 => 'color: #00b000;',
+            3 => 'color: #888822;',
+            4 => 'color: #888822;',
+            5 => 'color: #0011dd;',
+            6 => 'color: #440088;',
+            7 => 'color: #991111;',
+            8 => 'color: #00b000;',
+            9 => 'color: #888822;',
+            ),
+        ),
+    'URLS' => array(
+        1 => '',
+//        2 => ''
+        ),
+    'OOLANG' => false,
+    'OBJECT_SPLITTERS' => array(),
+    'REGEXPS' => array(
+        0 => "[0-9,]+[acd][0-9,]+",
+        //Removed lines
+        1 => array(
+            GESHI_SEARCH => '(^|(?<=\A\s))\\&lt;.*$',
+            GESHI_REPLACE => '\\0',
+            GESHI_MODIFIERS => 'm',
+            GESHI_BEFORE => '',
+            GESHI_AFTER => ''
+            ),
+        //Inserted lines
+        2 => array(
+            GESHI_SEARCH => '(^|(?<=\A\s))\\&gt;.*$',
+            GESHI_REPLACE => '\\0',
+            GESHI_MODIFIERS => 'm',
+            GESHI_BEFORE => '',
+            GESHI_AFTER => ''
+            ),
+        //Location line
+        3 => array(
+            GESHI_SEARCH => '(^|(?<=\A\s))-{3}\\s.*$',
+            GESHI_REPLACE => '\\0',
+            GESHI_MODIFIERS => 'm',
+            GESHI_BEFORE => '',
+            GESHI_AFTER => ''
+            ),
+        //Inserted line
+        4 => array(
+            GESHI_SEARCH => '(^|(?<=\A\s))(\\+){3}\\s.*$',
+            GESHI_REPLACE => '\\0',
+            GESHI_MODIFIERS => 'm',
+            GESHI_BEFORE => '',
+            GESHI_AFTER => ''
+            ),
+        //Modified line
+        5 => array(
+            GESHI_SEARCH => '(^|(?<=\A\s))\\!.*$',
+            GESHI_REPLACE => '\\0',
+            GESHI_MODIFIERS => 'm',
+            GESHI_BEFORE => '',
+            GESHI_AFTER => ''
+            ),
+        //File specification
+        6 => array(
+            GESHI_SEARCH => '(^|(?<=\A\s))[\\@]{2}.*$',
+            GESHI_REPLACE => '\\0',
+            GESHI_MODIFIERS => 'm',
+            GESHI_BEFORE => '',
+            GESHI_AFTER => ''
+            ),
+        //Removed line
+        7 => array(
+            GESHI_SEARCH => '(^|(?<=\A\s))\\-.*$',
+            GESHI_REPLACE => '\\0',
+            GESHI_MODIFIERS => 'm',
+            GESHI_BEFORE => '',
+            GESHI_AFTER => ''
+            ),
+        //Inserted line
+        8 => array(
+            GESHI_SEARCH => '(^|(?<=\A\s))\\+.*$',
+            GESHI_REPLACE => '\\0',
+            GESHI_MODIFIERS => 'm',
+            GESHI_BEFORE => '',
+            GESHI_AFTER => ''
+            ),
+        //File specification
+        9 => array(
+            GESHI_SEARCH => '(^|(?<=\A\s))(\\*){3}\\s.*$',
+            GESHI_REPLACE => '\\0',
+            GESHI_MODIFIERS => 'm',
+            GESHI_BEFORE => '',
+            GESHI_AFTER => ''
+            ),
+        ),
+    'STRICT_MODE_APPLIES' => GESHI_NEVER,
+    'SCRIPT_DELIMITERS' => array(
+        ),
+    'HIGHLIGHT_STRICT_BLOCK' => array(
+        )
+);