rb_io_gets_m     3321 io.c               VALUE line = rb_io_gets_m(argc, argv, io);
rb_io_gets_m     9702 io.c               while (!NIL_P(str = rb_io_gets_m(arg->argc, arg->argv, arg->io))) {
rb_io_gets_m     12320 io.c               rb_define_method(rb_cIO, "gets",  rb_io_gets_m, -1);