[documentation] [Documentation task] Update API documentation for forms api #type => item

[Jax]

Issue status update for 
http://drupal.org/node/88274
Post a follow up: 
http://drupal.org/project/comments/add/88274

 Project:      Documentation
 Version:      <none>
 Component:    Developer Guide
 Category:     tasks
 Priority:     normal
 Assigned to:  Anonymous
 Reported by:  Jax
 Updated by:   Jax
 Status:       active

There is no mention of the 'item' type in the forms api documentation:
http://api.drupal.org/api/4.7/file/developer/topics/forms_api_reference....


It's missing from the HEAD docs too.




Jax