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.

function x = varg_nest (varargin)
  x = abs (f (-5)) + g;

  function x = f (varargin)
    x = abs (varargin{1});
  endfunction

  function x = g
    x = abs (varargin{1});
  endfunction
endfunction