diff -r 490d5cc509ed -r cf61fcea0001 wp/wp-includes/Text/Diff/Engine/shell.php
--- a/wp/wp-includes/Text/Diff/Engine/shell.php	Tue Jun 09 11:14:17 2015 +0000
+++ b/wp/wp-includes/Text/Diff/Engine/shell.php	Mon Oct 14 17:39:30 2019 +0200
@@ -135,10 +135,10 @@
      *
      * @access private
      *
-     * @param array &$text_lines Either $from_lines or $to_lines
-     * @param int   &$line_no    Current line number
-     * @param int   $end         Optional end line, when we want to chop more
-     *                           than one line.
+     * @param array $text_lines Either $from_lines or $to_lines (passed by reference).
+     * @param int   $line_no    Current line number (passed by reference).
+     * @param int   $end        Optional end line, when we want to chop more
+     *                          than one line.
      *
      * @return array The chopped lines
      */