ref: 954b2fd7a8a0a65a077b61a5932ed54d3e3ef6a5 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