      \fitem{reshape}{(t, s)} builds an array of shape \code{s} with the
      element of tab \code{t}. These elements are taken circularly one
      after the other. For instance
      \begin{lstlisting}
            @reshape([1, 2, 3, 4, 5, 6], [3, 2])
            ->[ [1, 2], [3, 4], [5, 6] ]
      \end{lstlisting}



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

