Fix syntax

Author: Arkalo2

forms.rst

@@ -950,7 +950,7 @@ 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 
+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`.
 
@@ -1000,14 +1000,14 @@ Here, the referral code is an extra field injected at view level.
 The field name is composed of form ``user_create`` and the field name ``referralCode``.
 It's automatically generated from the form class name. You can :ref:`override it <changing-the-form-name>`
 
-Or you can use use 
-.. code-block:: html+twig
+Or you can use use
+
+.. code-block:: twig
+
     {{ form.vars.full_name ~ '[referralCode]' }} 
     
 to render the form name dynamically
 
-{{ form.vars.full_name ~ '[description]' }}
-
 You can get the referral code via ``getExtraData``::
 
     $extraData = $form->getExtraData();