Added a lot more explanation about form field validation, including expanded examples. Fixed #5843, #6652, #7428.
Added a lot more explanation about form field validation, including expanded
examples. Fixed #5843, #6652, #7428.


git-svn-id: 4f9f921b081c523744c7bf24d959a0db39629563@9177 bcc190cf-cafb-0310-a4f2-bffc1f526a37

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