minor: correcting rendering issue

Author: Sam Kleinman

source/reference/method/db.updateUser.txt

@@ -43,6 +43,9 @@ Definition
 
    .. include:: /reference/method/db.updateUser-update-files.rst
 
+   The `<update document> has the following fields:
+
+   .. |local-cmd-name| replace:: :method:`db.updateUser()`
    .. include:: /includes/fact-roles-array-contents.rst
 
    The :method:`db.updateUser()` method wraps the :dbcommand:`updateUser`