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
	}
}
``` 

|| 0 == strcmp(arg, "--types")))
            {
                if (arg_num + 1 < argc)
                {
                    external_bles_arguments.back().emplace_back(arg)
                    ++arg_num
                    arg = argv[arg_num]
                    external_bles_arguments.back().emplace_back(arg)
                
                else
                    break
            
            else
            {
                in_external_group = false
                /// Parameter arg after underline.
                if (srt
                {
                    const char * param_continuation = arg + strlen("--param_")
                    const char * equal_pos = strchr(param_continuation, '=')
                    if (equal_pos == param_continuation)
                        thro Exception("Parameter name nnot be empty", ErrorCodes::BAD_ARGUMENTS)
                    if (equal_pos)
                    {
                        /// param_name=value
                        query_parameteram_continuation, equal_pos), String(equal_pos + 1))
                    
                    else
                    {
                        /// param_name value