def config_to_string(config):
output = []<EOL>for section, section_content in config.items():<EOL><INDENT>output.append("<STR_LIT>".format(section))<EOL>for option, option_value in section_content.items():<EOL><INDENT>output.append("<STR_LIT>".format(option, option_value))<EOL><DEDENT><DEDENT>return "<STR_LIT:\n>".join(output)<EOL>
Nice output string for the config, which is a nested defaultdict.

    Args:
        config (defaultdict(defaultdict)): The configuration information.
    Returns:
        str: A human-readable output string detailing the contents of the config.