[json-lib] fix bug in FAQ 1747694
[json-lib] fix bug in FAQ 1747694

vladuke/json-lib-fork,aalmiray/Json-lib,vladuke/json-lib-fork,kohsuke/Json-lib,flytreeleft/Json-lib,flytreeleft/Json-lib,vladuke/json-lib-fork,aalmiray/Json-lib,kohsuke/Json-lib,flytreeleft/Json-lib