Allow trans filter to be safe

Author: Mathieu Lechat

src/Symfony/Bridge/Twig/Resources/views/Form/form_div_layout.html.twig

@@ -219,7 +219,13 @@
                 {% set label = name|humanize %}
             {%- endif -%}
         {%- endif -%}
-        <label{% for attrname, attrvalue in label_attr %} {{ attrname }}="{{ attrvalue }}"{% endfor %}>{{ translation_domain is same as(false) ? label : label|trans({}, translation_domain) }}</label>
+        <label{% for attrname, attrvalue in label_attr %} {{ attrname }}="{{ attrvalue }}"{% endfor %}>
+            {%- if translation_domain is same as(false) -%}
+                {{- label -}}
+            {%- else -%}
+                {{- label|trans({}, translation_domain) -}}
+            {%- endif -%}
+        </label>
     {%- endif -%}
 {%- endblock form_label -%}