**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.
```
{
    total_rows = 0;
    writeCString("\nExtremes:\n", out);
    write(std::move(chunk), PortKind::Extremes);
}
void PrettyBlockOutputFormat::writeMonoChunkIfNeeded()
{
    if (mono_chunk)
    {
        writeChunk(mono_chunk, PortKind::Main);
        mono_chunk.clear();
    }
}
void PrettyBlockOutputFormat::writeSuffix()
{
    writeMonoChunkIfNeeded();
    if (total_rows >= format_settings.pretty.max_rows)
    {
        writeCString("  Showed first ", out);
        writeIntText(format_settings.pretty.max_rows, out);
        writeCString(".\n", out);
    }
}
void registerOutputFormatPretty(FormatFactory & factory)
{
    registerPrettyFormatWithNoEscapesAndMonoBlock<PrettyBlockOutputFormat>(factory, "Pretty");
}
}