ref: bc9ee15fdd4a4c961bac0de2f4f9c4fceccd4a86 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