--- rest25/library/development.rst	2008-12-19 16:58:07.000000000 +0900
+++ rest262/library/development.rst	2009-04-05 05:02:09.000000000 +0900
@@ -1,22 +1,24 @@
 
 .. _development:
 
 *****************
 Development Tools
 *****************
 
 The modules described in this chapter help you write software.  For example, the
 :mod:`pydoc` module takes a module and generates documentation based on the
 module's contents.  The :mod:`doctest` and :mod:`unittest` modules contains
 frameworks for writing unit tests that automatically exercise code and verify
-that the expected output  is produced.
+that the expected output is produced.  :program:`2to3` can translate Python 2.x
+source code into valid Python 3.x code.
 
 The list of modules described in this chapter is:
 
 
 .. toctree::
 
    pydoc.rst
    doctest.rst
    unittest.rst
+   2to3.rst
    test.rst
