doc: Update documentation for functions returning a graphics handle h (Bug #34761) * voronoi.m, image.m, imagesc.m, imshow.m, area.m, bar.m, barh.m, clabel.m, clf.m, compass.m, ezcontour.m, ezcontourf.m, ezmesh.m, ezmeshc.m, ezplot.m, ezplot3.m, ezpolar.m, ezsurf.m, ezsurfc.m, feather.m, fill.m, findall.m, findobj.m, loglog.m, mesh.m, pareto.m, patch.m, pie.m, pie3.m, plot.m, polar.m, quiver.m, quiver3.m, rectangle.m, ribbon.m, rose.m, scatter.m, scatter3.m, semilogx.m, semilogy.m, slice.m, stem.m, surf.m, surface.m, text.m, title.m, trimesh.m, triplot.m, trisurf.m, xlabel.m, ylabel.m, zlabel.m: Update documentation for functions returning a graphics handle h.

--- a/scripts/plot/ylabel.m
+++ b/scripts/plot/ylabel.m
@@ -42,14 +42,16 @@
 
 endfunction
 
+
 %!test
 %! hf = figure ("visible", "off");
 %! unwind_protect
 %!   y = ylabel ("ylabel_string");
-%!   assert (get(gca, "ylabel"), y);
-%!   assert (get(y, "type"), "text");
-%!   assert (get(y, "visible"), "on");
-%!   assert (get(y, "string"), "ylabel_string");
+%!   assert (get (gca, "ylabel"), y);
+%!   assert (get (y, "type"), "text");
+%!   assert (get (y, "visible"), "on");
+%!   assert (get (y, "string"), "ylabel_string");
 %! unwind_protect_cleanup
 %!   close (hf);
 %! end_unwind_protect
+