add another example

add another example to constant.rst

diff --git a/doc/functions/constant.rst b/doc/functions/constant.rst
index 68ab2cf..5b247b3 100644 (file)
--- a/doc/functions/constant.rst
+++ b/doc/functions/constant.rst
@@ -6,3 +6,4 @@
 .. code-block:: jinja
 
     {{ some_date|date(constant('DATE_W3C')) }}
+    {{ constant('Namespace\\Classname::CONSTANT_NAME') }}