diff -r 34716fd837a4 -r be944660c56a wp/wp-includes/Text/Diff.php
--- a/wp/wp-includes/Text/Diff.php	Tue Dec 15 15:52:01 2020 +0100
+++ b/wp/wp-includes/Text/Diff.php	Wed Sep 21 18:19:35 2022 +0200
@@ -75,7 +75,7 @@
      *
      * @since Text_Diff 1.1.0
      *
-     * @return integer The number of new lines
+     * @return int The number of new lines
      */
     function countAddedLines()
     {
@@ -94,7 +94,7 @@
      *
      * @since Text_Diff 1.1.0
      *
-     * @return integer The number of deleted lines
+     * @return int The number of deleted lines
      */
     function countDeletedLines()
     {
@@ -139,7 +139,7 @@
     /**
      * Checks for an empty diff.
      *
-     * @return boolean  True if two sequences were identical.
+     * @return bool True if two sequences were identical.
      */
     function isEmpty()
     {
@@ -156,7 +156,7 @@
      *
      * This is mostly for diagnostic purposes.
      *
-     * @return integer  The length of the LCS.
+     * @return int The length of the LCS.
      */
     function lcs()
     {
@@ -210,7 +210,7 @@
      * with array_walk().
      *
      * @param string $line  The line to trim.
-     * @param integer $key  The index of the line in the array. Not used.
+     * @param int    $key   The index of the line in the array. Not used.
      */
     static function trimNewlines(&$line, $key)
     {
@@ -220,14 +220,12 @@
     /**
      * Determines the location of the system temporary directory.
      *
-     * @static
-     *
      * @access protected
      *
      * @return string  A directory name which can be used for temp files.
      *                 Returns false if one could not be found.
      */
-    function _getTempDir()
+    static function _getTempDir()
     {
         $tmp_locations = array('/tmp', '/var/tmp', 'c:\WUTemp', 'c:\temp',
                                'c:\windows\temp', 'c:\winnt\temp');
@@ -278,7 +276,7 @@
 
         $prevtype = null;
         foreach ($this->_edits as $edit) {
-            if ($prevtype == get_class($edit)) {
+            if ($edit instanceof $prevtype) {
                 trigger_error("Edit sequence is non-optimal", E_USER_ERROR);
             }
             $prevtype = get_class($edit);