Clarify where "Documenting Python" can be found.
diff --git a/Doc/README.txt b/Doc/README.txt
index c63fc60..64e307e 100644
--- a/Doc/README.txt
+++ b/Doc/README.txt
@@ -7,7 +7,8 @@
Documentation on the authoring Python documentation, including information about
both style and markup, is available in the "Documenting Python" chapter of the
-documentation. There's also a chapter intended to point out differences to
+developers guide (http://docs.python.org/devguide/documenting.html).
+There's also a chapter intended to point out differences to
those familiar with the previous docs written in LaTeX.