WriteJson shouldn't add newline if object or array is empty during pretty format

insert into default values("k01",{"name":{},"arr":[]});

insert into default values("k02",{"name":{"fname":"xyz"},"arr":[5]});

select * from default;

{

    "requestID": "73177554-f71c-47fa-9e4d-cd60573d3834",

    "signature": {

        "*": "*"

    },

    "results": [

        {

            "default": {

                "arr": [],

                "name": {}

            }

        },

        {

            "default": {

                "arr": [

                    5

                ],

                "name": {

                    "fname": "xyz"

                }

            }

        }

    ],

    "status": "success",

    "metrics": {

        "elapsedTime": "41.800759ms",

        "executionTime": "41.699968ms",

        "resultCount": 2,

        "resultSize": 299

    }

}