Better conventions between generic views and syndication feed framework

[fractal]

There is a small inconsistency between generic view object_detail and item template from the feed framework.

One names the return object: {{ object }} the other {{ obj }}

Having the same name would simplify the interchange of templates among them.

It is not far fetched to have a generic view for post_detail and using that as the template for item post on the feed.

object_detail documentation:
object: The object. This variable's name depends on the template_object_name parameter, which is 'object' by default. If template_object_name is 'foo', this variable's name will be foo.

syndication feed framework documentation:
feeds/latest_description.html for example uses {{ obj }} -- The current object (one of whichever objects you returned in items()).

Cheers

[Aymeric Augustin]

Change UI/UX from NULL to False.

[Aymeric Augustin]

Change Easy pickings from NULL to False.

[Aymeric Augustin]

This ticket pertains to the function-based generic views which were removed for Django.

See also #19904.