Merge branch '6.2' into 6.3

* 6.2:
  inline the constructor
  [Mailer] Add a way to change the Bus transport dynamically

Author: javiereguiluz

form/data_transformers.rst

@@ -177,11 +177,8 @@ to and from the issue number and the ``Issue`` object::
 
     class IssueToNumberTransformer implements DataTransformerInterface
     {
-        private $entityManager;
-
-        public function __construct(EntityManagerInterface $entityManager)
+        public function __construct(private EntityManagerInterface $entityManager)
         {
-            $this->entityManager = $entityManager;
         }
 
         /**

mailer.rst

@@ -1342,6 +1342,17 @@ disable asynchronous delivery.
     The :method:`Symfony\\Component\\Mailer\\Transport\\Smtp\\SmtpTransport::stop`
     method was made public in Symfony 6.1.
 
+You can also select the transport by adding an ``X-Bus-Transport`` header (which
+will be remove automatically from the final message)::
+
+    // Use the bus transport "app.another_bus":
+    $email->getHeaders()->addTextHeader('X-Bus-Transport', 'app.another_bus');
+    $mailer->send($email);
+
+.. versionadded:: 6.2
+
+    The ``X-Bus-Transport`` header support was introduced in Symfony 6.2.
+
 Adding Tags and Metadata to Emails
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