rb_str_gsub_bang(argc, argv, str)
    int argc;
    VALUE *argv;
    VALUE str;
{
    return str_gsub(argc, argv, str, 1);
}
rb_str_gsub_bang(argc, argv, str)
    int argc;
    VALUE *argv;
    VALUE str;
{
    return str_gsub(argc, argv, str, 1);
}