Spaceless is deprecated since Twig 2.7.

Author: pokurek

Resources/views/datatable/datatable_js.json.twig

@@ -1,4 +1,3 @@
-{% spaceless %}
 {
     "selector": "#sg-datatables-{{ sg_datatables_view.uniqueName }}", 
     {% include '@SgDatatables/datatable/language.html.twig' %},
@@ -9,5 +8,4 @@
     {% include '@SgDatatables/datatable/extensions.html.twig' %}
     {% include '@SgDatatables/datatable/columns.html.twig' %},
     {% include '@SgDatatables/datatable/initial_search.html.twig' %}
-}
-{% endspaceless %}
+}