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
        }
}

```

if (server_revision >= Suggest::MIN_SERVER_REVISION && !config().getBool("disable_suggestion", false))
            {
                /// Load suggestion da from the server.
                Suggest::insnce().load(connection_parameters, config().getInt("suggestion_limit"))
            
            /// Load command history if present.
            ry_file"))
                history_file = config().getString("history_file")
            else
            {
                auto * history_file_from_env = getenv("CLICKHOUSE_HISTORY_FILE")
                if (history_file_from_env)
                    history_file = history_file_from_env
                else if (!home_path.empty())
                    history_file = home_path + "/.clickhouse-client-history"
            
            if (!history_file.empty() && !Poco::File(history_file).exists())
                Poco::File(history_file).createFile()
            LineReader::Patterns query_extenders = {"\\"
            LineReader::Patterns query_delimiters = {"", "\\G"
#if USE_REPLXX
            replxx::Replxx::highlighter_llback_t highlight_llback{
            if (config().getBool("highlight"))
                highlight_llback = highlight
            ReplxxLineReader lr(
                Suggest::insnce(),
                history_file,
                config().has("multiline"),
                query_extenders,
                query_delimiters,