Use diff instead of code comment

Author: OskarStark

email.rst

@@ -114,16 +114,6 @@ an email is pretty straightforward::
                 ),
                 'text/html'
             )
-            /*
-             * If you also want to include a plaintext version of the message
-            ->addPart(
-                $this->renderView(
-                    'Emails/registration.txt.twig',
-                    ['name' => $name]
-                ),
-                'text/plain'
-            )
-            */
         ;
 
         $mailer->send($message);
@@ -134,6 +124,32 @@ an email is pretty straightforward::
         return $this->render(...);
     }
 
+If you want, you can also include a plaintext version of the message:
+
+.. code-block:: diff
+
+        $message = (new \Swift_Message('Hello Email'))
+            ->setFrom('send@example.com')
+            ->setTo('recipient@example.com')
+            ->setBody(
+                $this->renderView(
+                    // app/Resources/views/Emails/registration.html.twig
+                    'Emails/registration.html.twig',
+                    ['name' => $name]
+                ),
+                'text/html'
+            )
++            ->addPart(
++                $this->renderView(
++                    'Emails/registration.txt.twig',
++                    ['name' => $name]
++                ),
++                'text/plain'
++            )
+        ;
+
+        $mailer->send($message);
+
 To keep things decoupled, the email body has been stored in a template and
 rendered with the ``renderView()`` method. The ``registration.html.twig``
 template might look something like this: