namespace cln {
-void format_new_roman (cl_ostream stream, const cl_I& arg)
+void format_new_roman (std::ostream& stream, const cl_I& arg)
{
if (!(0 < arg && arg < 4000)) {
fprint(std::cerr, "format_new_roman: argument should be in the range 1 - 3999, not ");