Got it.
 On 8 Apr 2013 11:24, "Sam Kleinman" <notifications@github.com> wrote:

> In source/core/indexes.txt:
>
> > @@ -105,7 +105,7 @@ You cannot delete the index on ``_id``.
> >  The ``_id`` field is the :term:`primary key` for the collection, and
> >  every document *must* have a unique ``_id`` field. You may store any
> >  unique value in the ``_id`` field. The default value of ``_id`` is
> > -:term:`ObjectID` on every insert() <db.collection.insert()` operation. An :term:`ObjectId`
> > +:term:`ObjectID` on every `insert() <db.collection.insert()>` operation. An :term:`ObjectId`
>
> this should be:
>
>   :method:`~db.collection.insert()`
>
> —
> Reply to this email directly or view it on GitHub<https://github.com/mongodb/docs/pull/820/files#r3697583>
> .
>