test_increment.json

 1{"Put":{"state":"1ˇ2\n"}}
 2{"Key":"ctrl-a"}
 3{"Get":{"state":"1ˇ3\n","mode":"Normal"}}
 4{"Key":"ctrl-x"}
 5{"Get":{"state":"1ˇ2\n","mode":"Normal"}}
 6{"Key":"9"}
 7{"Key":"9"}
 8{"Key":"ctrl-a"}
 9{"Get":{"state":"11ˇ1\n","mode":"Normal"}}
10{"Key":"1"}
11{"Key":"1"}
12{"Key":"1"}
13{"Key":"ctrl-x"}
14{"Get":{"state":"ˇ0\n","mode":"Normal"}}
15{"Key":"."}
16{"Get":{"state":"-11ˇ1\n","mode":"Normal"}}