#30699: Remove `PublisherDetail.get_context_data()` from documentation
               Reporter:  Davit Gachechiladze   |          Owner:  nobody
                   Type:  Cleanup/optimization  |         Status:  new
              Component:  Documentation         |        Version:  2.2
               Severity:  Normal                |       Keywords:
           Triage Stage:  Unreviewed            |      Has patch:  1
    Needs documentation:  0                     |    Needs tests:  0
Patch needs improvement:  0                     |  Easy pickings:  0
                  UI/UX:  0                     |
 The following code snippet is from

 from django.views.generic import ListView
 from django.views.generic.detail import SingleObjectMixin
 from books.models import Publisher

 class PublisherDetail(SingleObjectMixin, ListView):
     paginate_by = 2
     template_name = "books/publisher_detail.html"

     def get(self, request, *args, **kwargs):
         self.object = self.get_object(queryset=Publisher.objects.all())
         return super().get(request, *args, **kwargs)

     def get_context_data(self, **kwargs):
         context = super().get_context_data(**kwargs)
         context['publisher'] = self.object
         return context

     def get_queryset(self):
         return self.object.book_set.all()

 `PublisherDetail.get_context_data(self, **kwargs)` is not neccessary here
 at all, isn't it ? `SingleObjectMixin.get_context_data(self, **kwargs)` is
 responsible to add `publisher` key in `context` dict, which is called from
 `BaseListView.get(self, request, *args, **kwargs)`.

Ticket URL: <https://code.djangoproject.com/ticket/30699>
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