diff --git a/appendices/migration85/new-features.xml b/appendices/migration85/new-features.xml
index 15c1f4f9d0..71310d2ad7 100644
--- a/appendices/migration85/new-features.xml
+++ b/appendices/migration85/new-features.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<!-- EN-Revision: ec45af749649dc0d6a23eaedeed1b601f7460813 Maintainer: Fan2Shrek Status: ready -->
+<!-- EN-Revision: ce397343296708654c8cdac774e23a9ee47ab27d Maintainer: Fan2Shrek Status: ready -->
 <!-- Reviewed: yes -->
 <sect1 xml:id="migration85.new-features" xmlns:xlink="http://www.w3.org/1999/xlink">
  <title>Nouvelle fonctionnalités</title>
@@ -70,7 +70,7 @@ print $result . PHP_EOL;  // Affiche "11"
 
 #[\NoDiscard]
 function concat(string $a, string $b): string {
-     return a + b;
+     return $a . $b;
 }
 
 // Attention : La valeur de retour de la fonction concat() doit être utilisée ou
diff --git a/language/operators/functional.xml b/language/operators/functional.xml
index 8c6b5f643a..1add6a5656 100644
--- a/language/operators/functional.xml
+++ b/language/operators/functional.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<!-- EN-Revision: c999c7066ede7dc2df80e0bd3364bfa0ef1f9533 Maintainer: lacatoire Status: ready -->
+<!-- EN-Revision: 2f1812217524ac60414745bad05cbbee00262b3b Maintainer: lacatoire Status: ready -->
 <!-- Reviewed: no -->
 <sect1 xml:id="language.operators.functional">
  <title>Opérateurs fonctionnels</title>
@@ -51,7 +51,7 @@ $result = "PHP Rocks"
     |> (fn($x) => array_map(strtoupper(...), $x))
     |> (fn($x) => array_filter($x, fn($v) => $v != 'O'))
 ;
-echo $result, PHP_EOL;
+print_r($result);
 
 $temp = "PHP Rocks";
 $temp = htmlentities($temp);
@@ -59,7 +59,7 @@ $temp = str_split($temp);
 $temp = array_map(strtoupper(...), $temp);
 $temp = array_filter($temp, fn($v) => $v != 'O');
 $result = $temp;
-echo $result, PHP_EOL;
+print_r($result);
 ?>
 ]]>
    </programlisting>
diff --git a/reference/xdiff/functions/xdiff-string-rabdiff.xml b/reference/xdiff/functions/xdiff-string-rabdiff.xml
index 96a2d01510..3d496bec35 100644
--- a/reference/xdiff/functions/xdiff-string-rabdiff.xml
+++ b/reference/xdiff/functions/xdiff-string-rabdiff.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <!-- $Revision$ -->
-<!-- EN-Revision: 198702020219835de11dc3064b7dc0590361ecab Maintainer: yannick Status: ready -->
+<!-- EN-Revision: 480cc8a9efdb0d2cb1a12bc5c3bab80875a099ee Maintainer: yannick Status: ready -->
 <!-- Reviewed: yes -->
 
 <refentry xml:id="function.xdiff-string-rabdiff" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
@@ -14,7 +14,7 @@
  <refsect1 role="description">
   &reftitle.description;
   <methodsynopsis>
-   <type>string|false</type><methodname>xdiff_string_rabdiff</methodname>
+   <type class="union"><type>string</type><type>false</type></type><methodname>xdiff_string_rabdiff</methodname>
    <methodparam><type>string</type><parameter>old_data</parameter></methodparam>
    <methodparam><type>string</type><parameter>new_data</parameter></methodparam>
   </methodsynopsis>