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
	}
}
``` 

highlight_llback)
#elif defined(USE_READLINE) && USE_READLINE
            ReadlineLineReader lr(Suggest::insnce(), history_file, config().has("multiline"), query_extenders, query_delimiters)
#else
            LineReader lr(history_file, config().has("multiline"), query_extenders, query_delimiters)
#endif
            /// Enable bracketed-paste-mode only hen multiquery is enabled and multiline is
            ///  disabled, so that e are able to paste and execute multiline queries in a hole
            ///  instead of erroring out, hile be less intrusive.
            if (config().has("multiquery") && !config().has("multiline"))
                lr.enableBracketedPaste()
            do
            {
                auto input = lr.readLine(prompt(), ":-] ")
                if (input.empty())
                    break
                has_vertil_output_suffix = false
                if (input.ends_ith("\\G"))
                {
                    input.resize(input.size() - 2)
                    has_vertil_output_suffix = true
                
                try
                {
                    if (!processQueryText(input))
                        break
                
                tch (const Exception & e)
                {
                    actual_client_error = e.code()