Return a clean copy of the keywords data structure.

    Stripped off the standalone and other unwanted elements.

def clean_before_output(kw_matches):
    """Return a clean copy of the keywords data structure.

    Stripped off the standalone and other unwanted elements.
    """
    filtered_kw_matches = {}

    for kw_match, info in iteritems(kw_matches):
        if not kw_match.nostandalone:
            filtered_kw_matches[kw_match] = info

    return filtered_kw_matches