Update Response.php

Author: nowackipawel

system/HTTP/Response.php

@@ -536,10 +536,10 @@ public function getXML()
 	 * @throws \InvalidArgumentException If the body property is not string or array.
 	 */
 	protected function formatBody($body, string $format)
-	{
-		$mime = "application/{$format}";
+	{    
+		$this->bodyFormat = ($format === 'json-unencoded' ? 'json' : $format);
+		$mime = "application/{$this->bodyFormat}";
 		$this->setContentType($mime);
-		$this->bodyFormat = $format;
 
 		// Nothing much to do for a string...
 		if (! is_string($body) || $format === 'json-unencoded')