code: function step(element, type, cb) {
      return function generate(error, html) {
        html += minimize.helpers[type](element);
        return returns(error, html, cb);
      }
    }
docs: Minimize single level of HTML.
  
  @param {Object} element Properties
  @param {String} type Element type
  @param {Function} cb Completion callback
  @api private