Update URL

Doc/whatsnew/whatsnew23.tex

@@ -1081,7 +1081,7 @@ Dylan''}{http://www.webcom.com/haahr/dylan/linearization-oopsla96.html}.
 To understand the motivation for this change, 
 read Michele Simionato's article 
 \ulink{``Python 2.3 Method Resolution Order''}
-      {http://www.phyast.pitt.edu/\textasciitilde micheles/mro.html}, or
+      {http://www.python.org/2.3/mro.html}, or
 read the thread on python-dev starting with the message at
 \url{http://mail.python.org/pipermail/python-dev/2002-October/029035.html}.
 Samuele Pedroni first pointed out the problem and also implemented the