eq?
original commit: d405416eb2ec6d5dd147afc7a2af5a6c2f0a8130
7.ss, scheme.1.in, comments of many files original commit: 06f858f9a505b9d6fb6ca1ac97234927cb2dc641
original commit: 47a210c15c63ba9677852269447bd2f2598b51fe