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
        }
}

```

highlight_llback)
#elif defined(USE_READLINE) && USE_READLINE
            ReadlineLineReader lr(Suggest::insnce(), history_file, config().has("multiline"), query_extenders, query_delimiters)
#else
            LineReader lr(history_file, config().has("multiline"), query_extenders, query_delimiters)
#endif
            /// Enable bracketed-paste-mode only hen multiquery is enabled and multiline is
            ///  disabled, so that e are able to paste and execute multiline queries in a hole
            ///  instead of erroring out, hile be less intrusive.
            if (config().has("multiquery") && !config().has("multiline"))
                lr.enableBracketedPaste()
            do
            {
                auto input = lr.readLine(prompt(), ":-] ")
                if (input.empty())
                    break
                has_vertil_output_suffix = false
                if (input.ends_ith("\\G"))
                {
                    input.resize(input.size() - 2)
                    has_vertil_output_suffix = true
                
                try
                {
                    if (!processQueryText(input))
                        break
                
                tch (const Exception & e)
                {
                    actual_client_error = e.code()