Fixed #14185 - improved example SQL for 'select' example.

Thanks to Trindaz for the suggestion.

Also fixed some references to 'lede' which is no longer part of the
example Blog model.


git-svn-id: http://code.djangoproject.com/svn/django/trunk@13652 bcc190cf-cafb-0310-a4f2-bffc1f526a37