static VALUE
argf_lines(int argc, VALUE *argv, VALUE argf)
{
rb_warn("ARGF#lines is deprecated; use #each_line instead");
if (!rb_block_given_p())
return rb_enumeratorize(argf, ID2SYM(rb_intern("each_line")), argc, argv);
return argf_each_line(argc, argv, argf);
}