void pre()
{
    string files;

    programs(0);
    
    files = stringlist("", "yo", "*.yo");

    cleanup("paren", files);

    files = stringlist("", "yo", "*.cc") + 
            stringlist("", "yo", "*.h") +
            stringlist("", "yo", "*.ih");

    cleanup("tab", files);
    cleanup("trim", files);

    exit(0);
}

