ref: 5fcbb16c1fc1b1cc64ce149f9b1adf352a1da01c 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