ref: 98faed57da6da8b1e39ebaa2e9e4c22ac2cef5c3 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