Use Matlab coding conventions for demos in plot/ directory. * contrast.m, axis.m, clabel.m, colorbar.m, comet.m, contour.m, contour3.m, cylinder.m, daspect.m, errorbar.m, ezplot.m, fplot.m, grid.m, hold.m, isosurface.m, legend.m, loglog.m, loglogerr.m, pareto.m, patch.m, pbaspect.m, pie.m, pie3.m, plot3.m, plotmatrix.m, plotyy.m, quiver.m, quiver3.m, rectangle.m, refreshdata.m, scatter.m, scatter3.m, semilogx.m, semilogxerr.m, semilogy.m, semilogyerr.m, shading.m, stem.m, subplot.m, text.m, title.m, trimesh.m, triplot.m, trisurf.m, uigetdir.m, uigetfile.m, uimenu.m, uiputfile.m, waitbar.m, xlim.m, ylim.m, zlim.m: Use Matlab coding conventions for demos so that compare plots scripts will function.

--- a/scripts/plot/isosurface.m
+++ b/scripts/plot/isosurface.m
@@ -197,9 +197,9 @@
 %! isosurface (x, y, z, v, 1);
 
 %!shared x, y, z, val
-%!  [x, y, z]  = meshgrid (0:1, 0:1, 0:1); ## Points for single
-%!  val        = [0, 0; 0, 0];             ## cube and a 3-D
-%!  val(:,:,2) = [0, 0; 1, 0];             ## array of values
+%!  [x, y, z]  = meshgrid (0:1, 0:1, 0:1); %% Points for single
+%!  val        = [0, 0; 0, 0];             %% cube and a 3-D
+%!  val(:,:,2) = [0, 0; 1, 0];             %% array of values
 %!test
 %!  fv = isosurface (x, y, z, val, 0.3);
 %!  assert (isfield (fv, "vertices"), true);