A comment for the «mage.formKey» JavaScript widget is an unterminated sentence:

dmitry_fedyuk · January 26, 2016, 8:51am

magento/magento2/blob/720667e/app/code/Magento/PageCache/view/frontend/web/js/page-cache.js#L54-L56


/**
 * FormKey Widget - this widget is generating from key, saves it to cookie and
 */