Class add into Content template

<?php

protected function _content_template(){ ?>

       <#
       view.addInlineEditingAttributes( 'title', 'none' );
       view.addRenderAttribute( 'title', {'class':'entry-title'} );
       #>

       <p {{{ view.getRenderAttributeString( 'title' ) }}}>{{{ settings.title }}}</p>

<?php }