ref: e8c2fe57e7ec1d7465eb6f00bdb7aad8f4264c29 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