Fixed -- Clarified {% firstof %} tag's handling of arguments.
@@ -261,8 +261,9 @@ Sample usage::
``firstof``
-----------
-Outputs the first argument variable that is not ``False``. Outputs nothing if
-all the passed variables are ``False``.
+Outputs the first argument variable that is not "false" (i.e. exists, is not
+empty, is not a false boolean value, and is not a zero numeric value). Outputs
+nothing if all the passed variables are "false".
Sample usage::
