Index: wp-includes/wp-diff.php
===================================================================
--- wp-includes/wp-diff.php	(revision 17779)
+++ wp-includes/wp-diff.php	(working copy)
@@ -69,8 +69,7 @@
 	 * @param array $params
 	 */
 	function __construct( $params = array() ) {
-		$parent = get_parent_class($this);
-		$this->$parent( $params );
+		parent::__construct( $params );
 	}
 
 	/**
Index: wp-includes/Text/Diff/Renderer.php
===================================================================
--- wp-includes/Text/Diff/Renderer.php	(revision 17779)
+++ wp-includes/Text/Diff/Renderer.php	(working copy)
@@ -33,7 +33,7 @@
     /**
      * Constructor.
      */
-    function Text_Diff_Renderer($params = array())
+    function __construct($params = array())
     {
         foreach ($params as $param => $value) {
             $v = '_' . $param;
Index: wp-includes/Text/Diff.php
===================================================================
--- wp-includes/Text/Diff.php	(revision 17779)
+++ wp-includes/Text/Diff.php	(working copy)
@@ -33,7 +33,7 @@
      *                           Normally an array of two arrays, each
      *                           containing the lines from a file.
      */
-    function Text_Diff($engine, $params)
+    function __construct($engine, $params)
     {
         // Backward compatibility workaround.
         if (!is_string($engine)) {
@@ -304,13 +304,13 @@
      * @param array $mapped_to_lines    This array should have the same number
      *                                  of elements as $to_lines.
      */
-    function Text_MappedDiff($from_lines, $to_lines,
+    function __construct($from_lines, $to_lines,
                              $mapped_from_lines, $mapped_to_lines)
     {
         assert(count($from_lines) == count($mapped_from_lines));
         assert(count($to_lines) == count($mapped_to_lines));
 
-        parent::Text_Diff($mapped_from_lines, $mapped_to_lines);
+        parent::__construct($mapped_from_lines, $mapped_to_lines);
 
         $xi = $yi = 0;
         for ($i = 0; $i < count($this->_edits); $i++) {
@@ -366,7 +366,7 @@
  */
 class Text_Diff_Op_copy extends Text_Diff_Op {
 
-    function Text_Diff_Op_copy($orig, $final = false)
+    function __construct($orig, $final = false)
     {
         if (!is_array($final)) {
             $final = $orig;
@@ -391,7 +391,7 @@
  */
 class Text_Diff_Op_delete extends Text_Diff_Op {
 
-    function Text_Diff_Op_delete($lines)
+    function __construct($lines)
     {
         $this->orig = $lines;
         $this->final = false;
@@ -413,7 +413,7 @@
  */
 class Text_Diff_Op_add extends Text_Diff_Op {
 
-    function Text_Diff_Op_add($lines)
+    function __construct($lines)
     {
         $this->final = $lines;
         $this->orig = false;
@@ -435,7 +435,7 @@
  */
 class Text_Diff_Op_change extends Text_Diff_Op {
 
-    function Text_Diff_Op_change($orig, $final)
+    function __construct($orig, $final)
     {
         $this->orig = $orig;
         $this->final = $final;