ref: 5b36d5c8a69402c36d272e0edbbc24c50bf5e1dc 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