Fixed some test models' natural_key() methods.
Completed long overdue sqlinitialdata deprecation.
Fixed #22613 -- Added formfield_for_choice_field() to the list of methods that InlineModelAdmin supports.
Fixed flake8 error.
Added 1.6.5 release note for refs #22508.
Fixed #22619 -- Corrected description of os.path.

Thanks Collin Anderson for the report.