Fixed #5605: only lowercase the domain portion of an email address in UserManager.create_user.

Thanks, Leo.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@12641 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/contrib/auth/tests/forms.py

@@ -219,4 +219,13 @@ True
 >>> form.cleaned_data['email']
 u'jsmith3@example.com'
 
+# bug #5605, preserve the case of the user name (before the @ in the email address)
+# when creating a user.
+>>> user = User.objects.create_user('test2', 'tesT@EXAMple.com', 'test')
+>>> user.email
+'tesT@example.com'
+>>> user = User.objects.create_user('test3', 'tesT', 'test')
+>>> user.email
+'tesT'
+
 """