ref: 0b1ae8fb344e5e5a26f50fa5c2f0dbb5c1318b87 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