maint: Use coding style with parentheses after function name to distinguish from a variable. * audiorecorder.m, interp3.m, iscolormap.m, spinmap.m, expm.m, copyfile.m, delete.m, edit.m, inputParser.m, movefile.m, narginchk.m, nargoutchk.m, publish.m, tar.m, tempdir.m, ode23.m, ode23s.m, ode45.m, odeplot.m, sqp.m, matlabroot.m, savepath.m, expand_rel_paths.m, datetick.m, lighting.m, material.m, rticks.m, shading.m, thetaticks.m, view.m, xticklabels.m, xticks.m, yticklabels.m, yticks.m, zticklabels.m, zticks.m, colorbar.m, errorbar.m, hist.m, isocaps.m, light.m, line.m, patch.m, shrinkfaces.m, stairs.m, surface.m, allchild.m, ancestor.m, cla.m, clf.m, findobj.m, gca.m, hggroup.m, isgraphics.m, ishandle.m, print.m, struct2hdl.m, arch_rnd.m, speed.m, clock.m: Use parentheses '()' after function invocation to distinguish between a variable and a function.

--- a/scripts/plot/util/findobj.m	Sat Oct 10 16:32:20 2020 -0700
+++ b/scripts/plot/util/findobj.m	Sat Oct 10 17:55:56 2020 -0700
@@ -329,7 +329,7 @@
 %!test
 %! hf = figure ("visible", "off");
 %! unwind_protect
-%!   l = line;
+%!   l = line ();
 %!   obj = findobj (hf, "type", "line");
 %!   assert (l, obj);
 %!   assert (gca, findobj (hf, "type", "axes"));