Fix the error that is wrong link title of a downloadable product when enabling "Use Default Value"

- Fix static code

Author: tna274

app/code/Magento/Downloadable/Model/Link/Builder.php

@@ -13,9 +13,8 @@
 use Magento\Framework\DataObject\Copy;
 
 /**
- * Class Builder
+ * Builder download link model for downloadable product
  *
- * @package Magento\Downloadable\Model\Link
  * @api
  * @since 100.1.0
  */

app/code/Magento/Downloadable/Model/Sample/Builder.php

@@ -15,9 +15,8 @@
 use Magento\Framework\DataObject\Copy;
 
 /**
- * Class Builder
+ * Builder download sample link model for downloadable product
  *
- * @package Magento\Downloadable\Model\Sample
  * @api
  * @since 100.1.0
  */

app/code/Magento/Downloadable/Test/Unit/Model/Link/BuilderTest.php

@@ -12,9 +12,7 @@
 use Magento\Downloadable\Helper\Download;
 
 /**
- * Class BuilderTest
- *
- * @package Magento\Downloadable\Test\Unit\Model\Link
+ * Unit test for downloadable products' builder link class
  */
 class BuilderTest extends \PHPUnit\Framework\TestCase
 {

app/code/Magento/Downloadable/Test/Unit/Model/Sample/BuilderTest.php

@@ -12,9 +12,7 @@
 use Magento\Downloadable\Model\Sample\Builder;
 
 /**
- * Class BuilderTest
- *
- * @package Magento\Downloadable\Test\Unit\Model\Sample
+ * Unit test for downloadable products' builder sample class
  */
 class BuilderTest extends \PHPUnit\Framework\TestCase
 {