Fix syntax

Author: Arkalo2

forms.rst

@@ -941,19 +941,18 @@ Additionally, if there are any fields on the form that aren't included in
 the submitted data, those fields will be explicitly set to ``null``.
 
 Extra fields
-~~~~~~~~~~~~~~~
+~~~~~~~~~~~~
 
-All form fields are considered properties of the object but you can inject fields 
-directly into your view without specifying them in the form definition.
-They can be retrieved via the ``getExtraData`` :class:`Symfony\\Component\\Form\\FormTypeInterface`. 
+All form fields are considered properties of the object but you can inject fields directly into your view without specifying them in the form definition.
+They can be retrieved via the ``getExtraData`` :class:`Symfony\\Component\\Form\\FormTypeInterface`.
 
 This is a creation user form::
 
     // ...
+    use App\User;
     use Symfony\Component\Form\Extension\Core\Type\CheckboxType;
     use Symfony\Component\Form\Extension\Core\Type\SubmitType;
     use Symfony\Component\Form\FormBuilderInterface;
-    use App\User;
 
     class UserCreateType extends AbstractType
     {
@@ -973,7 +972,9 @@ This is a creation user form::
         }
     }
 
-The extra fields can be injected like this::
+The extra fields can be injected like this:
+
+.. code-block:: twig
 
     {# templates/user/create.html.twig #}
     {{ form_start(form) }}
@@ -988,7 +989,7 @@ The extra fields can be injected like this::
 
 Here, the sponsorship code is an extra field injected at view level.
 
-You can get the referraCode via ``getExtraData``:: 
+You can get the referraCode via ``getExtraData``::
 
     $extraData = $form->getExtraData();
     $referraCode = $extraData['referralCode'] ?? null;