docs: improve explanation

Co-authored-by: Michal Sniatala <michal@sniatala.pl>

Author: kenjis

user_guide_src/source/tutorial/create_news_items.rst

@@ -91,7 +91,7 @@ Next, we check if we deal with the **POST** request with the
 :doc:`IncomingRequest <../incoming/incomingrequest>` object ``$this->request``.
 It is set in the controller by the framework.
 The :ref:`IncomingRequest::is() <incomingrequest-is>` method checks the type of the request.
-If the request is not a POST request, that is it is a GET request,
+Since the route for **create()** endpoint handles both: **GET** and **POST** requests we can safely assume that if the request is not POST then it is a GET type.
 the form is loaded and returned to display.
 
 Then, we get the necessary items from the POST data by the user and set them in the ``$post`` variable.