Fixed #19520 - Corrected some misleading docs about template_name_suffix.

    .. attribute:: template_name_suffix

        The CreateView page displayed to a GET request uses a

        ``template_name_suffix`` of ``'_form.html'``. For

        example, changing this attribute to ``'_create_form.html'`` for a view

        creating objects for the the example `Author` model would cause the the

        default `template_name` to be ``'myapp/author_create_form.html'``.

        The ``CreateView`` page displayed to a ``GET`` request uses a

        ``template_name_suffix`` of ``'_form'``. For

        example, changing this attribute to ``'_create_form'`` for a view

        creating objects for the example ``Author`` model would cause the

        default ``template_name`` to be ``'myapp/author_create_form.html'``.

    **Example views.py**::

    .. attribute:: template_name_suffix

        The UpdateView page displayed to a GET request uses a

        ``template_name_suffix`` of ``'_form.html'``. For

        example, changing this attribute to ``'_update_form.html'`` for a view

        updating objects for the the example `Author` model would cause the the

        default `template_name` to be ``'myapp/author_update_form.html'``.

        The ``UpdateView`` page displayed to a ``GET`` request uses a

        ``template_name_suffix`` of ``'_form'``. For

        example, changing this attribute to ``'_update_form'`` for a view

        updating objects for the example ``Author`` model would cause the

        default ``template_name`` to be ``'myapp/author_update_form.html'``.

    **Example views.py**::

    .. attribute:: template_name_suffix

        The DeleteView page displayed to a GET request uses a

        ``template_name_suffix`` of ``'_confirm_delete.html'``. For

        example, changing this attribute to ``'_check_delete.html'`` for a view

        deleting objects for the the example `Author` model would cause the the

        default `template_name` to be ``'myapp/author_check_delete.html'``.

        The ``DeleteView`` page displayed to a ``GET`` request uses a

        ``template_name_suffix`` of ``'_confirm_delete'``. For

        example, changing this attribute to ``'_check_delete'`` for a view

        deleting objects for the example ``Author`` model would cause the

        default ``template_name`` to be ``'myapp/author_check_delete.html'``.

    **Example views.py**::