ref: 38585ffa91d7b6e7b9e4f688e3f9fa84a48f1925 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