text: var Issue = require('../issue');
  
  module.exports = {
      name: 'head-req-title',
      on: ['title'],
      desc: 'If set, any `head` tag in the page must contain a non-empty `title` tag.'
  };
  
  module.exports.lint = function (titles, opts) {
      return titles.some(function(t) { return t.children.length > 0; })
          ? []
          : new Issue('E027', titles.head.openLineCol);
  }
  