test_increment_wrapping.json
 1{"Put":{"state":"1844674407370955161ˇ9\n"}}
 2{"Key":"ctrl-a"}
 3{"Get":{"state":"1844674407370955161ˇ5\n","mode":"Normal"}}
 4{"Key":"ctrl-a"}
 5{"Get":{"state":"-1844674407370955161ˇ5\n","mode":"Normal"}}
 6{"Key":"ctrl-a"}
 7{"Get":{"state":"-1844674407370955161ˇ4\n","mode":"Normal"}}
 8{"Key":"3"}
 9{"Key":"ctrl-x"}
10{"Get":{"state":"1844674407370955161ˇ4\n","mode":"Normal"}}
11{"Key":"2"}
12{"Key":"ctrl-a"}
13{"Get":{"state":"-1844674407370955161ˇ5\n","mode":"Normal"}}