Add contributor name.

Doc/whatsnew/whatsnew23.tex

@@ -1372,6 +1372,7 @@ the iterator for which the function \function{predicate()} returns
 \code{obj} \var{N} times.  There are a number of other functions in
 the module; see the \ulink{package's reference
 documentation}{../lib/module-itertools.html} for details.
+(Contributed by Raymond Hettinger.)
 
 \item Two new functions in the \module{math} module,
 \function{degrees(\var{rads})} and \function{radians(\var{degs})},