Reduce variable length name

isConfirmationRequired -> isConfirmRequired

Keep the variable name less than 20 chars

Author: convenient

app/code/Magento/Customer/Ui/Component/DataProvider/Document.php

@@ -178,14 +178,14 @@ private function setConfirmationValue()
     {
         $value = $this->getData(self::$confirmationAttributeCode);
         $websiteId = $this->getData(self::$websiteIdAttributeCode) ?: $this->getData(self::$websiteAttributeCode);
-        $isConfirmationRequired = (bool)$this->scopeConfig->getValue(
+        $isConfirmRequired = (bool)$this->scopeConfig->getValue(
             AccountManagement::XML_PATH_IS_CONFIRM,
             ScopeInterface::SCOPE_WEBSITES,
             $websiteId
         );
 
         $valueText = __('Confirmation Not Required');
-        if ($isConfirmationRequired) {
+        if ($isConfirmRequired) {
             $valueText = $value === null ? __('Confirmed') : __('Confirmation Required');
         }