minor: edit to use case docs

Author: Sam Kleinman

source/use-cases/inventory-management.txt

@@ -371,7 +371,7 @@ return them to available inventory if they do not.
 
            # First Pass: Find any carts that are active and refresh the carted items
            for cart in db.cart.find(
-               { '_id': {'$in': carted.keys() }, 
+               { '_id': {'$in': carted.keys() },
                'status':'active'}):
                cart = carted[cart['_id']]
 
@@ -391,11 +391,9 @@ return them to available inventory if they do not.
                    { '$inc': { 'qty': carted_item['qty'] },
                      '$pull': { 'carted': { 'cart_id': cart_id } } })
 
-TODO edit and polish the next paragraph.
-
-To summarize: This operation finds all "carted" items that have
-time stamps older than the threshold. Then, the process makes two
-passes over these items:
+To summarize: This operation finds all "carted" items that have time
+stamps older than the threshold. Then, the process makes two passes
+over these items:
 
 #. Of the items with time stamps older than the threshold, if the cart
    is still active, it resets the time stamp to maintain the carts.

source/use-cases/metadata-and-asset-management.txt

@@ -487,6 +487,6 @@ shard the collection
    ...     key : { '_id': 1 } })
    { "collectionsharded": "cms.assets.chunks", "ok": 1}
 
-Note that sharding on the ``_id`` field ensures routable queries because all reads
-from GridFS must first look up the document in ``cms.assets.files``
-and then look up the chunks separately.
+Sharding on the ``_id`` field ensures routable queries because all
+reads from GridFS must first look up the document in
+``cms.assets.files`` and then look up the chunks separately.