Cut and paste error.

--HG--
branch : distribute
extra : rebase_source : 2dd0749f676a281b4a09fd050686ea0821dd64f8

docs/setuptools.txt

@@ -406,7 +406,7 @@ unless you need the associated ``setuptools`` feature.
 
 ``run_2to3``
     Convert the source code from Python 2 to Python 3 with 2to3 during the 
-    build process. 
+    build process. See :doc:`python3` for more details.
 
 ``convert_doctests_2to3``
     List of doctest source files that need to be converted with 2to3.