Further feedback

Author: mcmorisi

source/read/change-streams.txt

@@ -84,6 +84,7 @@ as it occurs. The printed change event resembles the
 following:
 
 .. code-block:: json
+   :emphasize-lines: 14-20
 
    {
      "cursor": {
@@ -130,11 +131,11 @@ You can specify the following stages in the ``pipeline`` parameter:
 - ``$set``
 - ``$unset``
 
-Open a Change Stream with a Pipeline Example
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+Match Specific events Example
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
-The following example uses the ``pipeline`` parameter to open a change stream
-that records only update operations:
+The following example uses the ``pipeline`` parameter that includes a ``$match``
+to open a change stream that only records update operations:
 
 .. literalinclude:: /includes/read/change-streams.kt
    :start-after: start-change-stream-pipeline
@@ -215,8 +216,8 @@ change, chain the ``fullDocumentBeforeChange()`` or the ``fullDocument()``
 methods to the ``watch()`` method.
 
 The **pre-image** is the full version of a document *before* a change. To include the
-pre-image in the change stream event, pass the ``fullDocumentBeforeChange()`` method
-one of the following parameters:
+pre-image in the change stream event, pass one of the following options to the
+``fullDocumentBeforeChange()`` method:
 
 - ``FullDocumentBeforeChange.WHEN_AVAILABLE``: The change event includes a pre-image of the
   modified document for change events only if the pre-image is available.
@@ -225,8 +226,8 @@ one of the following parameters:
   driver raises an error.
 
 The **post-image** is the full version of a document *after* a change. To include the
-post-image in the change stream event, pass the ``fullDocument()`` method one of the
-following parameters:
+post-image in the change stream event, pass one of the following options to the 
+``fullDocument()`` method:
 
 - ``FullDocument.UPDATE_LOOKUP``: The change event includes a copy of the entire changed
   document from some time after the change.
@@ -237,7 +238,7 @@ following parameters:
   driver raises an error.
 
 The following example calls the ``watch()`` method on a collection and includes the post-image
-of updated documents by specifying the ``fullDocument`` parameter:
+of updated documents in the results by specifying the ``fullDocument`` parameter:
 
 .. literalinclude:: /includes/read/change-streams.kt
    :start-after: start-change-stream-post-image
@@ -250,8 +251,7 @@ With the change stream application running, updating a document in the
 ``restaurants`` collection by using the :ref:`preceding update example
 <kotlin-sync-change-stream-update>` prints a change event resembling the following:
 
-
-.. code-block:: sh
+.. code-block:: none
 
    ChangeStreamDocument{ operationType=update, resumeToken={"_data": "..."},
    namespace=sample_restaurants.restaurants, destinationNamespace=null, fullDocument=Restaurant(name=Blarney Castle, cuisine=Irish),