Add more links to Python sources where the code is short, readable and an informative adjunct to the docs.
diff --git a/Doc/library/contextlib.rst b/Doc/library/contextlib.rst
index 3005bd0..c435082 100644
--- a/Doc/library/contextlib.rst
+++ b/Doc/library/contextlib.rst
@@ -11,6 +11,11 @@
statement. For more information see also :ref:`typecontextmanager` and
:ref:`context-managers`.
+.. seealso::
+
+ Latest version of the `contextlib Python source code
+ <http://svn.python.org/view/python/branches/release27-maint/Lib/contextlib.py?view=markup>`_
+
Functions provided: