[PSR] Fixed Samples

- Using `php-cs-fixer` tool.

tests/PayPal/Test/Validation/ArgumentValidatorTest.php

@@ -47,5 +47,4 @@ class ArgumentValidatorTest extends \PHPUnit_Framework_TestCase
     {
         $this->assertTrue(ArgumentValidator::validate($input, "Name"));
     }
-
 }

tests/PayPal/Test/Validation/NumericValidatorTest.php

@@ -56,7 +56,6 @@ class NumericValidatorTest extends \PHPUnit_Framework_TestCase
      */
     public function testValidateException($input)
     {
-       NumericValidator::validate($input, "Test Value");
+        NumericValidator::validate($input, "Test Value");
     }
-
 }

tests/PayPal/Test/Validation/UrlValidatorTest.php

@@ -49,7 +49,6 @@ class UrlValidatorTest extends \PHPUnit_Framework_TestCase
      */
     public function testValidateException($input)
     {
-       UrlValidator::validate($input, "Test Value");
+        UrlValidator::validate($input, "Test Value");
     }
-
 }