minor: typo fix

Author: Sam Kleinman

source/reference/operator/in.txt

@@ -18,7 +18,7 @@ $in
 
       db.inventory.find( { qty: { $in: [ 5, 15 ] } } )
 
-   This query will attempt to select all documents in the ``inventory``
+   This query selects all documents in the ``inventory``
    collection where the ``qty`` field value is either ``5`` or
    ``15``. Although you can express this query using the
    :operator:`$or` operator, choose the :operator:`$in` operator rather