html_diff_tables_from_sections_iter: return a unicode-Markup instead of a bytestring-Markup object because py3
html_diff_tables_from_sections_iter: return a unicode-Markup instead of a bytestring-Markup object because py3

alphagov/digitalmarketplace-admin-frontend,alphagov/digitalmarketplace-admin-frontend,alphagov/digitalmarketplace-admin-frontend,alphagov/digitalmarketplace-admin-frontend