Easy to reproduce:
### 20.3.13
```
SELECT 1
FORMAT JSON

{
        "meta":
        [
                {
                        "name": "1",
                        "type": "UInt8"
                }
        ],

        "data":
        [
                {
                        "1": 1
                }
        ],

        "rows": 1,

        "statistics":
        {
                "elapsed": 0.000203731,
                "rows_read": 1,
                "bytes_read": 1
        }
}
```

### 20.4.5
```
:) select 1 format JSON

SELECT 1
FORMAT JSON

{
        "meta":
        [
                {
                        "name": "1",
                        "type": "UInt8"
                }
        ],

        "data":
        [
                {
                        "1": 1
>>>>>>>> no closing bracket <<<<<<<<<<
        ],

        "rows": 1,

        "statistics":
        {
                "elapsed": 0.000771732,
                "rows_read": 1,
                "bytes_read": 1
        }
}
```
### master
```

SELECT 1
FORMAT JSON

{
        "meta":
        [
                {
                        "name": "1",
                        "type": "UInt8"
                }
        ],

        "data":
        [
                {
                        "1": 1
>>>>>>>> no closing bracket <<<<<<<<<<
        ],

        "rows": 1,

        "statistics":
        {
                "elapsed": 0.00103364,
                "rows_read": 1,
                "bytes_read": 1
        }
}

```

#include "TestHint.h"
#include "ConnectionParameters.h"
#include "QueryFuzzer.h"
#include "Suggest.h"
#if USE_REPLXX
#   include <common/ReplxxLineReader.h>
#elif defined(USE_READLINE) && USE_READLINE
#   include <common/ReadlineLineReader.h>
#else
#   include <common/LineReader.h>
#endif
#include <stdlib.h>
#include <fcntl.h>
#include <signal.h>
#include <map>
#include <iostream>
#include <fstream>
#include <iomanip>
#include <unordered_set>
#include <algorithm>
#include <optional>
#include <ext/scope_guard.h>
#include <boost/program_options.hpp>
#include <boost/algorithm/string/replace.hpp>