ref: 4e4f36fcf5177b0c51c4bcb5a203c5f86edf6e00 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