Render the last 10 revisions of a page content with a list using
        the ``pages/revisions.html`` template

def show_revisions(context, page, content_type, lang=None):
    """Render the last 10 revisions of a page content with a list using
        the ``pages/revisions.html`` template"""
    if not pages_settings.PAGE_CONTENT_REVISION:
        return {'revisions': None}
    revisions = Content.objects.filter(page=page, language=lang,
                                type=content_type).order_by('-creation_date')
    if len(revisions) < 2:
        return {'revisions': None}
    return {'revisions': revisions[0:10]}