Use current approach to record documentation author.

Doc/lib/libstringio.tex

@@ -31,12 +31,10 @@ Free the memory buffer.
 
 \section{\module{cStringIO} ---
          Faster version of \module{StringIO}, but not subclassable.}
+
 \declaremodule{builtin}{cStringIO}
-
 \modulesynopsis{Faster version of \module{StringIO}, but not subclassable.}
-
-
-% This section was written by Fred L. Drake, Jr. <fdrake@acm.org>
+\sectionauthor{Fred L. Drake, Jr.}{fdrake@acm.org}
 
 The module \module{cStringIO} provides an interface similar to that of
 the \module{StringIO} module.  Heavy use of \class{StringIO.StringIO}