attr_* methods are private, but usage should be publically documented

The assorted attr_* method are marked as private in the Ruby source code, so rdoc does not include them in the generated API docs. However, they are not, strictly speaking, private methods that should not be called in user code, and their usage should appear in the generated rdoc files.

[steveklabnik]

I mean, they are private methods. They shouldn't be called in user code outside of an implementation of an Object.

With that said, I'm not opposed to documenting attr_* somehow, but it's certainly interesting.

I tried applied the :doc: directive in object.c but to no avail, perhaps I was doing it wrong.

Grr. Accirdentally closed this. No warning prompt?