def publish_html(data, metadata=None):
publish_display_data(<EOL>u'<STR_LIT>',<EOL>{'<STR_LIT>':data},<EOL>metadata=metadata<EOL>)<EOL>
Publish raw HTML data to all frontends.

    Parameters
    ----------
    data : unicode
        The raw HTML data to publish.
    metadata : dict
        A dictionary for metadata related to the data. This can contain
        arbitrary key, value pairs that frontends can use to interpret
        the data.