ref: 9a83081ebe28cc5d5e52718f3d0ef2d0a6df21b7 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