Add form_theme in error customization

rubenrubiob · xabbuh · commit d5c5ff1b2277 · 2017-07-04T22:19:17.000+02:00
User form_theme __self in error examples as in other examples of the page.
diff --git a/form/form_customization.rst b/form/form_customization.rst
@@ -866,6 +866,8 @@ and customize the ``form_errors`` fragment.
 
     .. code-block:: html+twig
 
+        {% form_theme form _self %}
+
         {# form_errors.html.twig #}
         {% block form_errors %}
             {% spaceless %}
@@ -926,6 +928,8 @@ fields (e.g. a whole form), and not just an individual field.
 
     .. code-block:: html+twig
 
+        {% form_theme form _self %}
+
         {# form_errors.html.twig #}
         {% block form_errors %}
             {% spaceless %}
