ref: 04c7c7f5989f7521ca68c8604b5b98b3bd4502bb 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