DOCS-1940: write command release notes

source/release-notes/2.6.txt

@@ -448,45 +448,64 @@ information.
 Write Operation Improvements
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
-.. versionadded 2.5.3
+New Write Commands
+``````````````````
+
+.. versionchanged:: 2.5.4
+
+MongoDB has updated the wire protocol to include new :dbcommand:`insert`,
+:dbcommand:`update`, and :dbcommand:`delete` commands for all write
+operations. You may specify a single write concern for each bulk
+writes operation. The new commands support a number of other
+configuration options including the ability to proceed if any
+individual write fails. See the documentation of these commands for
+more information: 
 
-MongoDB has updated the wire protocol to include new ``insert``,
-``update``, and ``delete`` commands for batch operations. You may
-specify a single write concern for each batch of writes. The new
-commands support a number of other configuration options including
-the ability to proceed if any individual write fails.
+- :dbcommand:`insert`,
+- :dbcommand:`update`, and 
+- :dbcommand:`delete` 
+
+The :program:`mongo` shell uses these new commands by default for
+*all* write operations when connected to a 2.5.4 or MongoDB
+instance. However, the :program:`mongo` shell will use legacy write
+operations when connected to earlier MongoDB instances.
+
+New Write Operations 
+`````````````````````
+
+.. versionadded 2.5.3
 
 MongoDB also introduces new changes to the update language:
 
 ``$mul`` Update Operator
-````````````````````````
+^^^^^^^^^^^^^^^^^^^^^^^^
 
 The new :update:`$mul` operator allows you to multiply the value of a
 field by the specified amount. See :update:`$mul` for details.
 
 ``xor`` operation for ``$bit`` Operator
-```````````````````````````````````````
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 The :update:`$bit` operator now supports bitwise updates using a logical
 ``xor`` operation. See the documentation of :update:`$bit` for more
 information on bitwise updates. Consider the following operation:
 
 ``$min`` Update Operator
-````````````````````````
+^^^^^^^^^^^^^^^^^^^^^^^^
 
 The new :update:`$min` operator updates the value of the field to a
 specified value *if* the specified value is **less than** the current
 value of the field. See :update:`$min` for details.
 
 ``$max`` Update Operator
-````````````````````````
+^^^^^^^^^^^^^^^^^^^^^^^^
 
 The new :update:`$max` operator updates the value of the field to a
 specified value *if* the specified value is **greater than** the
 current value of the field. See :update:`$max` for details.
 
 ``$currentDate`` Update Operator
-````````````````````````````````
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 The :update:`$currentDate` operator sets the value of a field to the
 current date, either as a :ref:`Date <document-bson-type-date>` or a