Ticket #12135: 12135a.diff

docs/howto/custom-template-tags.txt

@@ -862 +868 @@
 The difference here is that ``do_current_time()`` grabs the format string and
 the variable name, passing both to ``CurrentTimeNode3``.
 
+As in previous examples, you need to register the tag before you can use it::
+
+    register.tag('get_current_time', do_current_time)
+
 Parsing until another block tag
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~