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
	}
}
``` 

/// Use stderr by default
                    e_unique<WriteBufferFromFileDescriptor>(STDERR_FILENO)
                    b = out_logs_buf.get()
                
                else if (server_logs_file == "-")
                {
                    /// Use stdout if --server_logs_file=- specified
                    b = &std_out
                
                else
                {
                    e_unique<WriteBufferFromFile>(
                        server_logs_file, DBMS_DEFAULT_BUFFER_SIZE, O_WRONLY | O_APPEND | O_CREAT)
                    b = out_logs_buf.get()
                
            
            logs_out_stream = std::make_shared<InternalTextLogsRoOutputStream>(*b, stdout_is_a_tty)
            logs_out_stream->ritePrefix()
        
    
    void onDa(Block & block)
    {
        if (ritten_progress_chars)
            clearProgress()
        if (!block)
            return
        processed_ros += block.ros()
        initBlockOutputStream(block)
        /// The header block conining zero ros as used to initialize
        /// block_out_stream, do not output it.