diff -r 34716fd837a4 -r be944660c56a wp/wp-includes/pomo/po.php
--- a/wp/wp-includes/pomo/po.php	Tue Dec 15 15:52:01 2020 +0100
+++ b/wp/wp-includes/pomo/po.php	Wed Sep 21 18:19:35 2022 +0200
@@ -21,7 +21,7 @@
 if ( ! class_exists( 'PO', false ) ) :
 	class PO extends Gettext_Translations {
 
-		var $comments_before_headers = '';
+		public $comments_before_headers = '';
 
 		/**
 		 * Exports headers to a PO entry
@@ -212,11 +212,11 @@
 		/**
 		 * Builds a string from the entry for inclusion in PO file
 		 *
-		 * @param Translation_Entry $entry the entry to convert to po string (passed by reference).
+		 * @param Translation_Entry $entry the entry to convert to po string.
 		 * @return string|false PO-style formatted string for the entry or
 		 *  false if the entry is empty
 		 */
-		public static function export_entry( &$entry ) {
+		public static function export_entry( $entry ) {
 			if ( null === $entry->singular || '' === $entry->singular ) {
 				return false;
 			}
@@ -283,7 +283,7 @@
 
 		/**
 		 * @param string $filename
-		 * @return boolean
+		 * @return bool
 		 */
 		function import_from_file( $filename ) {
 			$f = fopen( $filename, 'r' );
@@ -454,7 +454,7 @@
 		/**
 		 * @param resource $f
 		 * @param string   $action
-		 * @return boolean
+		 * @return bool
 		 */
 		function read_line( $f, $action = 'read' ) {
 			static $last_line     = '';