Fixed typo in parameter name doc for BaseCommand.check().
Fixed copy/paste typos in StreamingHttpResponse doc.
Fixed and enhanced new HTML form docs.
Fixed #22894 -- Made admin add related/raw ID fields widgets customizable.

Decoupled behavior and style from the RelatedFieldWidgetWrapper and
ForeignKeyRawIdWidget.
Added newline to fix flake8 error.
Fixed docs/ref/contrib/auth.txt so that sphinx links work properly.
Fixed #8162 -- Increased Permission.name max_length to 255 characters.