DOCS-689 incorporate feedback from jeremy

Author: kay-kim

source/mongo.txt

@@ -62,7 +62,7 @@ To start the :program:`mongo` shell and connect to your :doc:`MongoDB
 
       use myDatabase
 
-   To list the available database, use the command ``show dbs``. See
+   To list the available databases, use the command ``show dbs``. See
    also :ref:`mongo-shell-getSiblingDB` to access a different database
    from the current database.
 
@@ -104,7 +104,7 @@ From the :program:`mongo` shell, you can use the :doc:`shell methods
   If the :program:`mongo` shell does not accept the name of the
   collection, for instance if the name contains a space or starts with
   a number, you can use an alternate syntax to refer to the
-  collection, as in the following alternates:
+  collection, as in the following:
 
   .. code-block:: javascript
 
@@ -434,11 +434,12 @@ Some useful methods for handling cursors are:
   cursor has more documents to return.
 
 - :method:`next() <cursor.next()>` which returns the next document and
-  moves by one the position of the cursor.
+  advances the cursor position forward by one.
 
 - :method:`forEach(\<function\>) <cursor.forEach()>` which iterates the
   whole cursor and applies the ``<function>`` to each document returned
-  by the cursor.
+  by the cursor. The ``<function>`` expects a single argument which
+  corresponds to the document from each iteration.
 
 For examples on iterating a cursor and retrieving the documents from
 the cursor, see :ref:`cursor handling <read-operations-cursors>`. See