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/time/datetick.m
+++ b/scripts/time/datetick.m
@@ -199,22 +199,22 @@
   endif
 
   if (isempty (form))
-    r = max(ticks) - min(ticks);
-    if r < 10/60/24
+    r = max (ticks) - min (ticks);
+    if (r < 10/60/24)
       ## minutes and seconds
       form = 13;
-    elseif r < 2
+    elseif (r < 2)
       ## hours
       form = 15;
-    elseif r < 15
+    elseif (r < 15)
       ## days
       form = 8;
-    elseif r < 365
+    elseif (r < 365)
       ## FIXME -- FORM should be 19 for European users who use dd/mm
       ## instead of mm/dd.  How can that be determined automatically?
       ## months
       form = 6;
-    elseif r < 90*12
+    elseif (r < 90*12)
       ## quarters
       form = 27;
     else