drupal/core/modules/comment/comment-entity-form.es6.js

/**
 * @file
 * Attaches comment behaviors to the entity form.
 */

(function ($, Drupal) {
  /**
   *
   * @type {Drupal~behavior}
   */
  Drupal.behaviors.commentFieldsetSummaries = {
    attach(context) {
      const $context = $(context);
      $context.find('fieldset.comment-entity-settings-form').drupalSetSummary(context => Drupal.checkPlain($(context).find('.js-form-item-comment input:checked').next('label').text()));
    },
  };
}(jQuery, Drupal));