fixes after a CR

Author: silinmykola

app/code/Magento/Eav/Block/Adminhtml/Attribute/Edit/Options/Options.php

@@ -147,7 +147,7 @@ protected function _prepareOptionValues(
         if ($type === 'select' || $type === 'multiselect') {
             $defaultValues = is_string($attribute->getDefaultValue())
                 ? explode(',', $attribute->getDefaultValue())
-                : [''];
+                : [];
             $inputType = $type === 'select' ? 'radio' : 'checkbox';
         } else {
             $defaultValues = [];

app/code/Magento/Paypal/Model/Api/Nvp.php

@@ -387,11 +387,15 @@ class Nvp extends \Magento\Paypal\Model\Api\AbstractApi
     protected $_doVoidRequest = ['AUTHORIZATIONID', 'NOTE'];
 
     /**
+     * GetTransactionDetailsRequest
+     *
      * @var string[]
      */
     protected $_getTransactionDetailsRequest = ['TRANSACTIONID'];
 
     /**
+     * GetTransactionDetailsResponse
+     *
      * @var string[]
      */
     protected $_getTransactionDetailsResponse = [
@@ -1196,7 +1200,7 @@ public function call($methodName, array $request)
             throw $e;
         }
 
-        $response = preg_split('/^\r?$/m', $response ?? '', 2);
+        $response = preg_split('/^\r?$/m', $response, 2);
         $response = trim($response[1]);
         $response = $this->_deformatNVP($response);
 

app/code/Magento/Store/Model/Store.php

@@ -437,13 +437,11 @@ public function __sleep()
     public function __wakeup()
     {
         parent::__wakeup();
-        // phpcs:disable Magento2.PHP.AutogeneratedClassNotInConstructor
         $this->_coreFileStorageDatabase = ObjectManager::getInstance()
             ->get(\Magento\MediaStorage\Helper\File\Storage\Database::class);
         $this->_config = ObjectManager::getInstance()->get(
             \Magento\Framework\App\Config\ReinitableConfigInterface::class
         );
-        // phpcs:enable
     }
 
     /**

lib/internal/Magento/Framework/Stdlib/ArrayManager.php

@@ -49,7 +49,7 @@ public function exists($path, array $data, $delimiter = self::DEFAULT_PATH_DELIM
      *
      * @param array|string $path
      * @param array $data
-     * @param array|null $defaultValue
+     * @param mixed $defaultValue
      * @param string $delimiter
      * @return mixed|null
      * @since 100.1.0