Formats the background section

    :param background: the background content or file.

    :type background: str or file

    :returns: the background content.
    :rtype: str

def _format_background(background):
    """Formats the background section

    :param background: the background content or file.

    :type background: str or file

    :returns: the background content.
    :rtype: str

    """
    # Getting the background
    if os.path.isfile(background):
        with open(background, "r") as i_file:
            background = i_file.read().splitlines()
    else:
        background = background.splitlines()

    # Formatting
    final_background = ""
    for line in background:
        if line == "":
            final_background += r"\\" + "\n\n"
            continue

        final_background += latex.wrap_lines(latex.sanitize_tex(line))

    return final_background