ref: 516fa1fdca8b62c85deeaf2e3d0b3f826afc8dba 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