Fixed multitable issue in showdowns table-extension

Thanks to welvet (3cf0cc7d21)

web/js/table.js

@@ -81,6 +81,7 @@
             tbl.push('</table>');
             // we are done with this table and we move along
             out.push(tbl.join('\n'));
+            tbl = [];
             continue;
           }
         }