Minor code improvements

Author: mazanax

lib/Response.php

@@ -96,13 +96,13 @@ private function prettifyHeaders($headers)
             $headers,
             function ($result, $header) {
                 if (false === strpos(':', $header) {
-                    $result['status'] = $header;
+                    $result['Status'] = $header;
 
                     return $result;
                 }
 
                 list ($key, $value) = explode(':', $header);
-                $result[$key] = $value;
+                $result[$key] = trim($value);
 
                 return $result;
             },