delaunayn: adjust node ordering for positive outward normal vectors (bug #53397) * delaunayn.m: Check sign of simplex volume, flip node order for negative volumes to ensure positive (outward-pointing) normal vectors. Add BISTs to check for positive volumes. * etc/News.8.md: Append function improvement note to delaunayn change paragraph under General Improvements.

classdef colon_op
  methods
    function r = colon (a, b, c)
      if (nargin == 2)
        r = sprintf ("%s:%s", class (a), class (b));
      else
        r = sprintf ("%s:%s:%s", class (a), class (b), class (c));
      endif
    endfunction
  endmethods
endclassdef