ref: 515b8e89c1a6c0859eaefbf7835a4e6497a57e0b 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