diff -r de56132c008d -r bdac73ed481e includes/diffengine/Engine/xdiff.php
--- a/includes/diffengine/Engine/xdiff.php	Sun Mar 28 21:49:26 2010 -0400
+++ b/includes/diffengine/Engine/xdiff.php	Sun Mar 28 23:10:46 2010 -0400
@@ -11,45 +11,45 @@
  */
 class Text_Diff_Engine_xdiff {
 
-    function diff($from_lines, $to_lines)
-    {
-        array_walk($from_lines, array('Text_Diff', 'trimNewlines'));
-        array_walk($to_lines, array('Text_Diff', 'trimNewlines'));
+		function diff($from_lines, $to_lines)
+		{
+				array_walk($from_lines, array('Text_Diff', 'trimNewlines'));
+				array_walk($to_lines, array('Text_Diff', 'trimNewlines'));
 
-        /* Convert the two input arrays into strings for xdiff processing. */
-        $from_string = implode("\n", $from_lines);
-        $to_string = implode("\n", $to_lines);
+				/* Convert the two input arrays into strings for xdiff processing. */
+				$from_string = implode("\n", $from_lines);
+				$to_string = implode("\n", $to_lines);
 
-        /* Diff the two strings and convert the result to an array. */
-        $diff = xdiff_string_diff($from_string, $to_string, count($to_lines));
-        $diff = explode("\n", $diff);
+				/* Diff the two strings and convert the result to an array. */
+				$diff = xdiff_string_diff($from_string, $to_string, count($to_lines));
+				$diff = explode("\n", $diff);
 
-        /* Walk through the diff one line at a time.  We build the $edits
-         * array of diff operations by reading the first character of the
-         * xdiff output (which is in the "unified diff" format).
-         *
-         * Note that we don't have enough information to detect "changed"
-         * lines using this approach, so we can't add Text_Diff_Op_changed
-         * instances to the $edits array.  The result is still perfectly
-         * valid, albeit a little less descriptive and efficient. */
-        $edits = array();
-        foreach ($diff as $line) {
-            switch ($line[0]) {
-            case ' ':
-                $edits[] = &new Text_Diff_Op_copy(array(substr($line, 1)));
-                break;
+				/* Walk through the diff one line at a time.  We build the $edits
+ 				* array of diff operations by reading the first character of the
+ 				* xdiff output (which is in the "unified diff" format).
+ 				*
+ 				* Note that we don't have enough information to detect "changed"
+ 				* lines using this approach, so we can't add Text_Diff_Op_changed
+ 				* instances to the $edits array.  The result is still perfectly
+ 				* valid, albeit a little less descriptive and efficient. */
+				$edits = array();
+				foreach ($diff as $line) {
+						switch ($line[0]) {
+						case ' ':
+								$edits[] = &new Text_Diff_Op_copy(array(substr($line, 1)));
+								break;
 
-            case '+':
-                $edits[] = &new Text_Diff_Op_add(array(substr($line, 1)));
-                break;
+						case '+':
+								$edits[] = &new Text_Diff_Op_add(array(substr($line, 1)));
+								break;
 
-            case '-':
-                $edits[] = &new Text_Diff_Op_delete(array(substr($line, 1)));
-                break;
-            }
-        }
+						case '-':
+								$edits[] = &new Text_Diff_Op_delete(array(substr($line, 1)));
+								break;
+						}
+				}
 
-        return $edits;
-    }
+				return $edits;
+		}
 
 }