ref: 6ddb81f706b6780bfad00c3d203a1bc7ea1f247b 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