minor: edits

Author: Bob Grabar

source/core/sharding-internals.txt

@@ -516,7 +516,7 @@ Determine if You are Connected to a :program:`mongos`
 
 If your application must determine whether it is connected to a
 :program:`mongos`, use the :dbcommand:`isMaster` command. If the
-application is connected to :program:`mongos`, the :dbcommand:`isMaster`
+application is connected to a :program:`mongos`, the :dbcommand:`isMaster`
 command returns a document with the string ``isdbgrid`` in the ``msg``
 field. For example:
 

source/reference/command/isdbGrid.txt

@@ -8,18 +8,21 @@ isdbgrid
 
    This command verifies that a process is a :program:`mongos`.
 
-   If you issue the :dbcommand:`isdbgrid` command when connected to a :program:`mongos`, the response document
-   resembles the following:
+   If you issue the :dbcommand:`isdbgrid` command when connected to a
+   :program:`mongos`, the response document includes the ``isdbgrid``
+   field set to ``1``. The returned document is similar to the
+   following:
 
    .. code-block:: javascript
 
       { "isdbgrid" : 1, "hostname" : "app.example.net", "ok" : 1 }
 
-   However, if you issue the :dbcommand:`isdbgrid` command when conneted
-   to a :program:`mongod`, the returned document also might include a
-   line that reads ``"isdbgrid" : 1``, though in this case as part of an
-   error message. The :dbcommand:`isdbgrid` command is not available to
-   :program:`mongod` and returns an error document similar to the following:
+   If you issue the :dbcommand:`isdbgrid` command when connected to a
+   :program:`mongod`, MongoDB returns an error document. The
+   :dbcommand:`isdbgrid` command is not available to :program:`mongod`.
+   The error document, however, also includes a line that reads
+   ``"isdbgrid" : 1``, just as in the document returned for a
+   :program:`mongos`. The error document is similar to the following:
 
    .. code-block:: javascript
 
@@ -33,6 +36,6 @@ isdbgrid
 
    You can instead use the :dbcommand:`isMaster` command to determine
    connection to a :program:`mongos`. When connected to a
-   :program:`mongos`, the :dbcommand:`isMaster` returns a document that
+   :program:`mongos`, the :dbcommand:`isMaster` command returns a document that
    contains the string ``isdbgrid`` in the ``msg`` field.