Unnecessary since introduction of DiscoveryTestRunner in 9012833a.

Thanks wildfire for the report.

Thanks Raphaël Barrois for the report and the initial patch and
Aymeric Augustin for the review.

This commit also lays the groundwork for future tests for the
makemigrations command.

The method didn't change standard __deepcopy__ in any way.

Thanks Aymeric Augustin for the suggestion.

Fixed #21270 -- Fixed E701 pep8 warnings

Thanks Manel Clos for the report and the initial patch, and
Marc Tamlyn and Tim Graham for the review.

refs #18866.

Thanks SamBull for the report.

Fixed #7261 -- support for __html__ for library interoperability

Fixed DeprecationWarning caused by assertEquals.

Refs #6730.

select_related('foo').select_related('bar') is now equivalent to
select_related('foo', 'bar').

Also reworded docs to recommend select_related(*fields) over select_related()

refs #21220.

Improvement on InlineFormSet doc, refs #21006

When both parent and child classes are decorated with override_settings,
child class settings should take precedence.
Thanks Sephi for the report and Marc Tamlyn for the review.

`HttpRequest.scheme` is `https` if `settings.SECURE_PROXY_SSL_HEADER` is
appropriately set and falls back to `HttpRequest._get_scheme()` (a hook
for subclasses to implement) otherwise.

`WSGIRequest._get_scheme()` makes use of the `wsgi.url_scheme` WSGI
environ variable to determine the request scheme.

`HttpRequest.is_secure()` simply checks if `HttpRequest.scheme` is
`https`.

This provides a way to check the current scheme in templates, for example.
It also allows us to deal with other schemes.

Thanks nslater for the suggestion.

Thanks treysta at gmail.com for the suggestion.

Fixed #19617 -- Refactored form metaclasses to support more inheritance scenarios.

Previously admindocs would throw an error when processing it:
"Error in "default-role" directive: no content permitted."

refs #6681

The idea is that if an object implements __html__ which returns a string this is
used as HTML representation (eg: on escaping). If the object is a str or unicode
subclass and returns itself the object is a safe string type.

This is an updated patch based on jbalogh and ivank patches.

Thanks ebertti at yahoo.com.br for the suggestion.

Thanks kontakt@eikefoken.de for the report.

Avoids failures on Windows. Refs #8918.

This config allows a clean run of flake8. Some of the ignored
codes will be remove over time as we clean things up.

Thanks Marc Tamlyn for the suggestion.

Thanks Keryn Knight for the report.