TaskListsController.php

<?php
        $header =
          javelin_tag(
            'h1',
            array(
              'class' => 'maniphest-task-group-header',
              'sigil' => 'task-group',
              'meta'  => array(
                'priority' => head($list)->getPriority(),
              ),
            ),
            phutil_escape_html($group).' ('.$count.') ' .
              phutil_render_tag('span', array(),
                  phutil_escape_html($totalEstimatedHours . ' estimated hours')));