SF #515041, Update path for 2.3

Doc/lib/libsite.tex

@@ -67,8 +67,8 @@ Then the following directories are added to \code{sys.path}, in this
 order:
 
 \begin{verbatim}
-/usr/local/lib/python1.5/site-packages/bar
-/usr/local/lib/python1.5/site-packages/foo
+/usr/local/lib/python2.3/site-packages/bar
+/usr/local/lib/python2.3/site-packages/foo
 \end{verbatim}
 
 Note that \file{bletch} is omitted because it doesn't exist; the