maint: miscellaneous style fixes for .m files * audio/mu2lin.m, deprecated/cut.m, general/cplxpair.m, general/genvarname.m, geometry/rectint.m, help/gen_doc_cache.m, image/hsv2rgb.m, image/rainbow.m, io/textscan.m, miscellaneous/bzip2.m, miscellaneous/compare_versions.m, miscellaneous/fact.m, miscellaneous/menu.m, optimization/fminbnd.m, optimization/fminunc.m, optimization/fzero.m, optimization/sqp.m, plot/__gnuplot_drawnow__.m, plot/axis.m, plot/findobj.m, plot/legend.m, plot/peaks.m, plot/private/__errplot__.m, plot/private/__fltk_print__.m, plot/private/__go_draw_axes__.m, plot/private/__patch__.m, polynomial/pchip.m, polynomial/residue.m, signal/periodogram.m, sparse/sprandsym.m, statistics/base/moment.m, statistics/distributions/expcdf.m, statistics/distributions/expinv.m, statistics/distributions/exppdf.m, statistics/tests/prop_test_2.m, statistics/tests/sign_test.m, statistics/tests/t_test.m, statistics/tests/t_test_2.m, statistics/tests/t_test_regression.m, strings/regexptranslate.m, time/datetick.m: Style fixes.

--- a/scripts/plot/axis.m
+++ b/scripts/plot/axis.m
@@ -180,7 +180,7 @@
       __do_tight_option__ (ca);
     elseif (strcmpi (ax, "square"))
       set (ca, "plotboxaspectratio", [1, 1, 1]);
-    elseif  (strcmp (ax, "equal"))
+    elseif (strcmp (ax, "equal"))
       if (strcmp (get (get (ca, "parent"), "__graphics_toolkit__"), "gnuplot"))
         ## FIXME - gnuplot applies the aspect ratio activepostionproperty.
         set (ca, "activepositionproperty", "position");
@@ -321,7 +321,7 @@
     scale = get (ca, strcat (ax, "scale"));
     if (! iscell (data))
       data = {data};
-    end
+    endif
     if (strcmp (scale, "log"))
       tmp = data;
       data = cellfun (@(x) x(x>0), tmp, "uniformoutput", false);
@@ -346,7 +346,7 @@
   set (ca,
        "xlim", __get_tight_lims__ (ca, "x"),
        "ylim", __get_tight_lims__ (ca, "y"));
-  if __calc_dimensions__ (ca) > 2
+  if (__calc_dimensions__ (ca) > 2)
     set (ca, "zlim", __get_tight_lims__ (ca, "z"));
   endif