kToXml HorizontalRule = return
                            [ el "empty-line" ()
                            , el "p" (txt (replicate 10 '—'))
                            , el "empty-line" () ]
block
blockToXml HorizontalRule = return
                            [ el "empty-line" ()
                            , el "p" (txt (replicate 10 '—'))
                            , el "empty-line" () ]
blockToXml HorizontalRule = return
                            [ el "empty-line" ()
                            , el "p" (txt (replicate 10 '—'))
                            , el "empty-line" () ]