Merge branch 'libs-upgrade' of https://github.com/magento-engcom/php-7.2-support into libs-upgrade

Author: Joan He

app/code/Magento/Ui/Controller/Adminhtml/Index/Render.php

@@ -100,7 +100,7 @@ public function execute()
         } catch (\Exception $e) {
             $this->logger->critical($e);
             $result = [
-                'error' => _('UI component could not be rendered because of system exception'),
+                'error' => __('UI component could not be rendered because of system exception'),
                 'errorcode' => $this->escaper->escapeHtml($e->getCode())
             ];
             /** @var \Magento\Framework\Controller\Result\Json $resultJson */