ref: 1b49f96477ee3dc7c36dc9dd6fda0c081b6aafbd 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