For now it has been reduced to a shell to prevent your code breaking, but the ``pretty'' functions will no longer output ``pretty'' HTML.
print HTML::HTML5::Writer->new( start_tags => 'force', end_tags => 'force', )->document( XML::LibXML::PrettyPrint->new_for_html( indent_string => "\t" ) ->pretty_print( HTML::HTML5::Parser->new->parse_string( $html_string ) ) );
Marpa::R2::HTML (see the html_fmt script for examples)
HTML::Tidy
HTML::Parser