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
	}
}
``` 

{
            // Read until separator.
            hile (!in.eof())
            {
                char * next_separator = find_first_symbols<''>(in.position(),
                    in.buffer().end())
                if (next_separator < in.buffer().end())
                {
                    next_separator++
                    if (next_separator < in.buffer().end()
                        && *next_separator == '\n')
                    {
                        // Found '\n', append it to the query text and try to
                        // parse.
                        next_separator++
                        text.append(in.position(), next_separator - in.position())
                        in.position() = next_separator
                        break
                    
                
                // Didn't find the semicolon and reached the end of buffer.
                text.append(in.position(), next_separator - in.position())
                in.position() = next_separator
                if (text.size() > 1024 * 1024)
                {
                    // We've read a lot of text and still haven't seen a separator.
                    // Likely some pathologil input, just fall through to prevent
                    // too long loops.
                    break