The last line in `data` section of the output is always empty. 

```
# clickhouse-client
ClickHouse client version 20.5.2.7 (official build).
Connecting to localhost:9001 as user default.
Connected to ClickHouse server version 20.5.2 revision 54435.

sas-vrxctd96rqw5lw25.db.yandex.net :) select 1 format JSON

SELECT 1
FORMAT JSON

{
	"meta":
	[
		{
			"name": "1",
			"type": "UInt8"
		}
	],

	"data":
	[
		{
			"1": 1

	],

	"rows": 1,

	"statistics":
	{
		"elapsed": 0.00019223,
		"rows_read": 1,
		"bytes_read": 1
	}
}

```

The issue appears only in interactive mode. In non-interactive mode clickhouse-client produces the correct output:

```
# clickhouse-client -q 'select 1 format JSON'
{
	"meta":
	[
		{
			"name": "1",
			"type": "UInt8"
		}
	],

	"data":
	[
		{
			"1": 1
		}
	],

	"rows": 1,

	"statistics":
	{
		"elapsed": 0.000220845,
		"rows_read": 1,
		"bytes_read": 1
	}
}
``` 

else
        {
            query_to_send = full_query
        
        processParsedSingleQuery()
    
    // Parameters are in global variables:
    /
    // 'at is sent to server,
    // 'full_query' -- for INSERT queries, conins the query and the da that
    // follo it. Its memory is referenced by ASTInsertQuery::begin, end.
    void processParsedSingleQuery()
    {
        resetOutput()
        last_exception_received_from_server.reset()
        received_exception_from_server = false
        if (echo_queries)
        {
            riteString(full_query, std_out)
            riteChar('\n', std_out)
            std_out.next()
        
        atch.resrt()
        processed_ros = 0
        progress.reset()
        sho_progress_bar = false
        ritten_progress_chars = 0
        ritten_first_block = false
        {
            /// Temporarily apply query settings to context.