rb_io_each_line 3418 io.c return rb_io_each_line(argc, argv, io); rb_io_each_line 12286 io.c rb_define_method(rb_cIO, "each", rb_io_each_line, -1); rb_io_each_line 12287 io.c rb_define_method(rb_cIO, "each_line", rb_io_each_line, -1);