DOCS-631: correting sh.addShard() syntax and use

Author: Sam Kleinman

source/administration/sharding.txt

@@ -88,9 +88,16 @@ use the following procedure as a quick starting point:
       sh.addShard( "mongodb0.example.net:27027" )
 
    If ``mongodb0.example.net:27027`` is a member of a replica
-   set, MongoDB will discover all other members of the replica set.
+   set, call the :method:`sh.addShard()` method with an argument that
+   resembles the following:
 
-   Repeat this step for each new shard in your cluster.
+   .. code-block:: javascript
+
+      sh.addShard( "<setName>/mongodb0.example.net:27027" )
+
+   Replace, ``<setName>`` with the name of the replica set, and
+   MongoDB will discover all other members of the replica set. Repeat
+   this step for each new shard in your cluster.
 
    .. optional::
 

source/tutorial/add-shards-to-shard-cluster.txt

@@ -54,8 +54,16 @@ For example:
 
    sh.addShard( "mongodb0.example.net:27027" )
 
-MongoDB will discover all other members of the replica set, if
-``mongodb0.example.net:27027`` is a member of a replica set.
+If ``mongodb0.example.net:27027`` is a member of a replica
+set, call the :method:`sh.addShard()` method with an argument that
+resembles the following:
+
+.. code-block:: javascript
+
+   sh.addShard( "<setName>/mongodb0.example.net:27027" )
+
+Replace, ``<setName>`` with the name of the replica set, and
+MongoDB will discover all other members of the replica set.
 
 .. note:: In production deployments, all shards should be replica sets.