ref: 0c7eb9f0d093a78520e5cff889dc3fd9d7f6d4c7 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