ref: ba6d0a1df98a5b2b1dc4ccc5ff1aad2d7359d9ea 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