ref: fc4fca0fa6c64a0fbe6fbb5c8faf1e5640b784ea 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