magento2/app/code/Magento/Sales/Controller/Order/History.php

<?php
/**
 *
 * Copyright © Magento, Inc. All rights reserved.
 * See COPYING.txt for license details.
 */
namespace Magento\Sales\Controller\Order;

use Magento\Framework\App\Action\HttpGetActionInterface as HttpGetActionInterface;
use Magento\Sales\Controller\OrderInterface;
use Magento\Framework\App\Action\Context;
use Magento\Framework\View\Result\PageFactory;

class History extends \Magento\Framework\App\Action\Action implements OrderInterface, HttpGetActionInterface
{
    /**
     * @var PageFactory
     */
    protected $resultPageFactory;

    /**
     * @param Context $context
     * @param PageFactory $resultPageFactory
     */
    public function __construct(
        Context $context,
        PageFactory $resultPageFactory
    ) {
        $this->resultPageFactory = $resultPageFactory;
        parent::__construct($context);
    }

    /**
     * Customer order history
     *
     * @return \Magento\Framework\View\Result\Page
     */
    public function execute()
    {
        /** @var \Magento\Framework\View\Result\Page $resultPage */
        $resultPage = $this->resultPageFactory->create();
        $resultPage->getConfig()->getTitle()->set(__('My Orders'));

        $block = $resultPage->getLayout()->getBlock('customer.account.link.back');
        if ($block) {
            $block->setRefererUrl($this->_redirect->getRefererUrl());
        }
        return $resultPage;
    }
}