'Returns any course updates in an html chunk. Used
for older implementations and a few tests that store
a single html object representing all the updates.'

@classmethod
def get_plain_html_updates(self, request, course):

    info_module = get_course_info_section_module(request, request.user, course, 'updates')
    info_block = getattr(info_module, '_xmodule', info_module)
    return (info_block.system.replace_urls(info_module.data) if info_module else '')
