ref: 9a2f63d47a96bf522e6c5d39e215b2e6a9e600c7 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