Fix PHPCS errors.

src/Http/Client/Adapter/Stream.php

@@ -173,7 +173,8 @@ class Stream
     {
         $body = $request->getBody();
         if (empty($body)) {
-            return $this->_contextOptions['content'] = '';
+            $this->_contextOptions['content'] = '';
+            return;
         }
         $body->rewind();
         $this->_contextOptions['content'] = $body->getContents();

src/Http/Client/Request.php

@@ -16,8 +16,8 @@ namespace Cake\Http\Client;
 use Cake\Core\Exception\Exception;
 use Psr\Http\Message\RequestInterface;
 use Zend\Diactoros\MessageTrait;
-use Zend\Diactoros\Stream;
 use Zend\Diactoros\RequestTrait;
+use Zend\Diactoros\Stream;
 
 /**
  * Implements methods for HTTP requests.