[PSR] Fixed Tests

- Using `php-cs-fixer` tool.

sample/payments/ListPayments.php

@@ -12,7 +12,6 @@
 require 'CreatePayment.php';
 use PayPal\Api\Payment;
 
-
 // ### Retrieve payment
 // Retrieve the PaymentHistory object by calling the
 // static `get` method on the Payment class, 
@@ -21,13 +20,12 @@ use PayPal\Api\Payment;
 // Refer the method doc for valid values for keys
 // (See bootstrap.php for more on `ApiContext`)
 try {
-
     $params = array('count' => 10, 'start_index' => 5);
 
     $payments = Payment::all($params, $apiContext);
 } catch (Exception $ex) {
     // NOTE: PLEASE DO NOT USE RESULTPRINTER CLASS IN YOUR ORIGINAL CODE. FOR SAMPLE ONLY
- 	ResultPrinter::printError("List Payments", "Payment", null, $params, $ex);
+    ResultPrinter::printError("List Payments", "Payment", null, $params, $ex);
     exit(1);
 }