update the reference to the Apple Publications Style Guide

Doc/doc/doc.tex

@@ -160,12 +160,10 @@ distribution, to create or maintain whole documents or sections.
 \section{Style Guide \label{style-guide}}
 
   The Python documentation should follow the \citetitle
-  [http://developer.apple.com/techpubs/macos8/pdf/apple_styleguide00.pdf]
+  [http://developer.apple.com/documentation/UserExperience/Conceptual/APStyleGuide/AppleStyleGuide2003.pdf]
   {Apple Publications Style Guide} wherever possible.  This particular
   style guide was selected mostly because it seems reasonable and is
-  easy to get online.  (Printed copies are available; see the Apple's
-  \citetitle[http://developer.apple.com/techpubs/faq.html]{Developer
-  Documentation FAQ} for more information.)
+  easy to get online.
 
   Topics which are not covered in the Apple's style guide will be
   discussed in this document if necessary.