Update master

Author: matulef

draft/core/indexes.txt

@@ -248,7 +248,7 @@ following form:
     ]
    }
 
-An index on the ``comments`` field would be a multikey index, and will
+An index on the ``comments.text`` field would be a multikey index, and will
 add items to the index for all of the sub-documents in the array. As a
 result you will be able to run the following query, using only the
 index to locate the document:
@@ -257,13 +257,6 @@ index to locate the document:
 
    db.feedback.find( { "comments.text": "Please expand the olive selection." } )
 
-The following operators are useful for interacting with arrays, like
-the ones that you would index using multikey indexes.
-
-- :operator:`$addToSet`
-- :operator:`$push`
-- :operator:`$pull`
-- :operator:`$all`
 
 .. warning::