Fixed #8757: Corrected formatting of inclusion tag example

git-svn-id: http://code.djangoproject.com/svn/django/trunk@8828 bcc190cf-cafb-0310-a4f2-bffc1f526a37

docs/howto/custom-template-tags.txt

@@ -719,7 +719,7 @@ like:
     Jump directly to <a href="{{ link }}">{{ title }}</a>.
 
 Then, any time you want to use that custom tag, load its library and call it
-without any arguments, like so::
+without any arguments, like so:
 
 .. code-block:: html+django