Use parser string concatenation rather than strcat() for performance in m-files. * __file_filter__.m, __get_funcname__.m, uigetfile.m, uiputfile.m, __makeinfo__.m, print_usage.m, fix_version.m, axis.m, __add_datasource__.m, print.m, __gnuplot_draw_axes__.m, __gnuplot_print__.m, __opengl_print__.m, __print_parse_opts__.m, saveas.m, html_compare_plot_demos.m: Use parser string concatenation rather than strcat() for performance in m-files.

--- a/scripts/gui/uigetfile.m	Mon Nov 30 09:15:58 2015 -0500
+++ b/scripts/gui/uigetfile.m	Mon Nov 30 08:20:08 2015 -0800
@@ -138,7 +138,7 @@
         outargs{6} = fdir;
       endif
       if (length (fname) > 0 || length (fext) > 0)
-        outargs{3} = strcat (fname, fext);
+        outargs{3} = [fname fext];
       endif
     elseif (! isempty (args{3}))
       print_usage ();