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.

geometryimages.m voronoi triplot griddata convhull delaunay inpolygon
interpimages.m interpft interpn interpderiv1 interpderiv2
plotimages.m plot hist errorbar polar mesh plot3 extended precisiondate
sparseimages.m gplot grid spmatrix spchol spcholperm
splineimages.m splinefit1 splinefit2 splinefit3 splinefit4 splinefit6