Add reference to solution for a commonly asked question.

rhettinger · rhettinger · commit 6c4b4b226721 · 2009-03-12T00:25:29.000Z
diff --git a/Doc/reference/datamodel.rst b/Doc/reference/datamodel.rst
@@ -1198,6 +1198,9 @@ Basic customization
 
    Arguments to rich comparison methods are never coerced.
 
+   To automatically generate ordering operations from a single root operation,
+   see the `Total Ordering recipe in the ASPN cookbook
+   <http://code.activestate.com/recipes/576529/>`_\.
 
 .. method:: object.__hash__(self)
 
