[1.2.X] Migrated one_to_one doctests. Thanks to George Sakkis for the patch....

[1.2.X] Migrated one_to_one doctests. Thanks to George Sakkis for the patch. (We have always been at war with doctests)

Backport of r14167 from trunk.

git-svn-id: http://code.djangoproject.com/svn/django/branches/releases/1.2.X@14173 bcc190cf-cafb-0310-a4f2-bffc1f526a37