argf_each_line   8665 io.c               rb_define_method(rb_cARGF, "each",  argf_each_line, -1);
argf_each_line   8666 io.c               rb_define_method(rb_cARGF, "each_line",  argf_each_line, -1);
argf_each_line   8669 io.c               rb_define_method(rb_cARGF, "lines", argf_each_line, -1);