      \fitem{stutter}(t:tab, n:numeric), \vImpure: returns a new tab whose
      elements are repeated n times. The receiver is unchanged. The
      argument is unchanged.
      \begin{lstlisting}
            @stutter([1, 2, 3, 4, 5, 6], 2) 
            -> [ 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6 ]
      \end{lstlisting}


      %%% -------------------------------------------------------

