Fixed #7825 - modeltests/delete tests failing after NFA merge, and improved documentation of these tests.
Fixed #7825 - modeltests/delete tests failing after NFA merge, and improved documentation of these tests.


git-svn-id: 4f9f921b081c523744c7bf24d959a0db39629563@8030 bcc190cf-cafb-0310-a4f2-bffc1f526a37

bfirsh/django-old,sam-tsai/django-old,Instagram/django,hugs/django,disqus/django-old,alex/django-old,mitsuhiko/django,mitsuhiko/django,t11e/django,alex/django-old,Smarsh/django,Instagram/django,Instagram/django,sam-tsai/django-old,skevy/django,bfirsh/django-old,t11e/django,alex/django-old,dcramer/django-compositepks,django-nonrel/django-nonrel,t11e/django,mitsuhiko/django,django-nonrel/django-nonrel,bfirsh/django-old,hugs/django,jamespacileo/django-france,disqus/django-old,disqus/django-old,dcramer/django-compositepks,Smarsh/django,jamespacileo/django-france,sam-tsai/django-old,dcramer/django-compositepks,jamespacileo/django-france,Smarsh/django,skevy/django,sam-tsai/django-old,django-nonrel/django-nonrel,Smarsh/django,hugs/django,skevy/django