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
        }
}

```

exit(0)
        
        /// Output of help message.
        if (options.count("help")
            || (options.count("host") && options["host"].as<std::string>() == "elp"))    /// If user rites -help instead of --help.
        {
            
            std::cout << external_description << "\n"
            std::cout << "In addition, --param_name=value n be specified for substitution of parameters for parametrized queries.\n"
            exit(0)
        
        if (options.count("log-level"))
            Poco::Logger::root().setLevel(options["log-level"].as<std::string>())
        size_t number_of_external_bles_ith_stdin_source = 0
        for (size_t i = 0 i < external_bles_arguments.size() ++i)
        {
            /// Parse commandline options related to external bles.
            line_parser(external_bles_arguments[i]).options(external_description).run()
            po::variables_map external_options
            po::store(parsed_bles, external_options)
            try
            {
                external_bles.emplace_back(external_options)
                if (external_bles.back().file == "-")
                    ++number_of_external_bles_ith_stdin_source
                if (number_of_external_bles_ith_stdin_source > 1)
                    thro Exception("To or more external bles has stdin (-) set as --file field", ErrorCodes::BAD_ARGUMENTS)
            
            tch (const Exception & e)
            {