ref: 4932b5f0cf6f495208a0c1e1f4b2810ecf84fb9a 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