Provide links to Python source in a handful of
cases where the source is a generally helpful
adjunct to the docs.
diff --git a/Doc/library/calendar.rst b/Doc/library/calendar.rst
index 2f11aad..30f2a94 100644
--- a/Doc/library/calendar.rst
+++ b/Doc/library/calendar.rst
@@ -22,6 +22,10 @@
calendar in Dershowitz and Reingold's book "Calendrical Calculations", where
it's the base calendar for all computations.
+.. seealso::
+
+ Latest version of the `calendar module Python source code
+ <http://svn.python.org/view/python/branches/release27-maint/Lib/calendar.py?view=markup>`_
.. class:: Calendar([firstweekday])