def METHOD_NAME(old, new):
    '''
    Returns the difference between two strings (as in stringDiff) in
    HTML format. HTML code in the strings is NOT escaped, so you
    will get weird results if the strings contain HTML.
    This function is intended as an example; you'll probably want
    a more sophisticated wrapper in practice.
    Params:
        old     the old string
        new     the new string
    Returns:
        the output of the diff expressed with HTML <ins> and <del>
        tags.
    Examples:
        >>> html_diff('The quick brown fox', 'The fast blue fox')
        'The <del>quick brown</del> <ins>fast blue</ins> fox'
    '''
    con = {'=': (lambda x: x),
           '+': (lambda x: "<ins>" + x + "</ins>"),
           '-': (lambda x: "<del>" + x + "</del>")}
    return " ".join([(con[a])(" ".join(b)) for a, b in string_diff(old, new)])