ref: 0c0a9801c0e2b92832a9f91d6a6e7f94e8ba277d dir: /test/data/stdsort-expected/
0 1 2 3 4 5 6 7 8 9 --- 1 2 3 4 5 6 7 8 9 10 --- C Cc a aa b cC d f fuckit go