fix documentation code block

diff --git a/doc/tags/set.rst b/doc/tags/set.rst
index 4f2b2ab..ac5ce53 100644 (file)
--- a/doc/tags/set.rst
+++ b/doc/tags/set.rst
@@ -29,6 +29,8 @@ The assigned value can be any valid :ref:`Twig expressions
 
 Several variables can be assigned in one block:
 
+.. code-block:: jinja
+
     {% set foo, bar = 'foo', 'bar' %}
 
     {# is equivalent to #}