ref: 8c0fab2ccc7f5d5c4a611a4de4078c7af21963da 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