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/refreshdata.m
+++ b/scripts/plot/refreshdata.m
@@ -111,10 +111,10 @@
 %! clf;
 %! x = 0:0.1:10;
 %! y = sin (x);
-%! plot (x, y, "ydatasource", "y");
+%! plot (x, y, 'ydatasource', 'y');
 %! for i = 1 : 100
 %!   pause (0.1);
 %!   y = sin (x + 0.1 * i);
-%!   refreshdata (gcf (), "caller");
-%! endfor
+%!   refreshdata (gcf (), 'caller');
+%! end