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
	}
}
``` 

r
            
            auto * as_insert = orig_ast->as<ASTInsertQuery>()
            if (as_insert && as_insert->da)
            {
                // INSERT da is ended by neline
                _symbols<'\n'>(as_insert->da, end)
                begin = as_insert->end
            
            full_query = text.substr(this_query_begin - text.da(),
                begin - text.da())
            // Don't repeat inserts, the bles gro too big. Also don't repeat
            // creates beuse first e run the unmodified query, it ill succeed,
            // and the subsequent queries ill fail. When e run out of fuzzer
            // errors, it may be interesting to add fuzzing of create queries that
            // raps columns into LoCardinality or Nullable. Also there are other
            // kinds of create queries such as CREATE DICTIONARY, e could fuzz
            // them as ell.
            int this_query_zer_runs
            if (as_insert
                || orig_ast->as<ASTCreateQuery>())
            {
                this_query_runs = 1
            
            ASTPtr fuzz_base = orig_ast
            for (int fuzz_step = 0 fuzz_step < this_query_runs fuzz_step++)
            {
                fprintf(stderr, "fuzzing step %d out of %d for query at pos %zd\n",
                    fuzz_step, this_query_runs, this_query_begin - text.da())
                ASTPtr ast_to_process