[1.7.x] Fixed #23491 -- Clarified tutorial 3.

Thanks diek for the suggestion.

Backport of 54fd84e432 from master

docs/intro/tutorial03.txt

@@ -287,7 +287,7 @@ you want, using whatever Python libraries you want.
 All Django wants is that :class:`~django.http.HttpResponse`. Or an exception.
 
 Because it's convenient, let's use Django's own database API, which we covered
-in :doc:`Tutorial 1 </intro/tutorial01>`. Here's one stab at the ``index()``
+in :doc:`Tutorial 1 </intro/tutorial01>`. Here's one stab at a new ``index()``
 view, which displays the latest 5 poll questions in the system, separated by
 commas, according to publication date:
 
@@ -304,6 +304,8 @@ commas, according to publication date:
         output = ', '.join([p.question_text for p in latest_question_list])
         return HttpResponse(output)
 
+    # Leave the rest of the views (detail, results, vote) unchanged
+
 There's a problem here, though: the page's design is hard-coded in the view. If
 you want to change the way the page looks, you'll have to edit this Python code.
 So let's use Django's template system to separate the design from Python by