ref: d48c3220b5bbf3604b0b16d344d3cc0c17c5f8a7 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