ref: 3fb4e8e6ab0ec8c1b29a97c4d260d2a030055bf6 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