Fixed #21195 -- Clarifed usage of template_name in tutorial part 4.

docs/intro/tutorial04.txt

@@ -271,7 +271,7 @@ two views abstract the concepts of "display a list of objects" and
 
 By default, the :class:`~django.views.generic.detail.DetailView` generic
 view uses a template called ``<app name>/<model name>_detail.html``.
-In our case, it'll use the template ``"polls/question_detail.html"``. The
+In our case, it would use the template ``"polls/question_detail.html"``. The
 ``template_name`` attribute is used to tell Django to use a specific
 template name instead of the autogenerated default template name. We
 also specify the ``template_name`` for the ``results`` list view --