chomp

/*
 *  call-seq:
 *     chomp            => $_
 *     chomp(string)    => $_
 *  
 *  Equivalent to <code>$_ = $_.chomp(<em>string</em>)</code>. See
 *  <code>String#chomp</code>.
 *     
 *     $_ = "now\n"
 *     chomp         #=> "now"
 *     $_            #=> "now"
 *     chomp "ow"    #=> "n"
 *     $_            #=> "n"
 *     chomp "xxx"   #=> "n"
 *     $_            #=> "n"
 */

static VALUE
rb_f_chomp(argc, argv)
    int argc;
    VALUE *argv;
{
    VALUE str = uscore_get();
    VALUE dup = rb_str_dup(str);

    if (NIL_P(rb_str_chomp_bang(argc, argv, dup)))
        return str;
    rb_lastline_set(dup);
    return dup;
}