ref: 83bca2aaa7635be1ef17fdd5e3b02348b79f7dcc 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