**Describe the unexpected behaviour**
```
milovidov-desktop :) SET output_format_pretty_row_numbers = 1

SET output_format_pretty_row_numbers = 1

Query id: bb15ca27-5a3c-48ac-814a-a3cfea42deda

Ok.

0 rows in set. Elapsed: 0.000 sec. 

milovidov-desktop :) SELECT 1 UNION ALL SELECT 2

SELECT 1
UNION ALL
SELECT 2

Query id: d940f566-7188-4d17-83d6-8421975791a9

   ┌─1─┐
1. │ 2 │
   └───┘
   ┌─1─┐
1. │ 1 │
   └───┘

2 rows in set. Elapsed: 0.001 sec.
```
#include <Common/PODArray.h>
#include <IO/WriteBuffer.h>
#include <IO/WriteHelpers.h>
#include <IO/Operators.h>
#include <Formats/FormatFactory.h>
#include <Processors/Formats/Impl/PrettyCompactBlockOutputFormat.h>
namespace DB