newsupernova/vendor/dotmailer/dotmailer-magento2-extension/Controller/Customer/Index.php

<?php

namespace Dotdigitalgroup\Email\Controller\Customer;

class Index extends \Magento\Newsletter\Controller\Manage
{
    public function execute()
    {
        $this->_view->loadLayout();
        $this->_view->getPage()->getConfig()->getTitle()->set(__('Newsletter Subscription'));
        $this->_view->renderLayout();
    }
}