Reword change log and add the resulting query in the manual.

Author: alinradut

user_guide_src/source/changelog.rst

@@ -173,7 +173,7 @@ Release Date: Not Released
    -  Added Interbase/Firebird database support via the *ibase* driver.
    -  Added ODBC support for ``create_database()``, ``drop_database()`` and ``drop_table()`` in :doc:`Database Forge <database/forge>`.
    -  Added **save_queries** configuration setting to *application/config/database.php* (defaults to ``TRUE``).
-   -  Added support for escaping arrays sent as binding values to ``query()``
+   -  Added support to binding arrays as ``IN()`` sets in ``query()``.
 
    -  :doc:`Query Builder <database/query_builder>` changes include:
 

user_guide_src/source/database/queries.rst

@@ -132,11 +132,14 @@ put the queries together for you. Consider the following example::
 The question marks in the query are automatically replaced with the
 values in the array in the second parameter of the query function.
 
-Bindings also work with array values, useful for queries involving the IN operator::
+Binding also work with arrays, which will be transformed to IN sets::
 
 	$sql = "SELECT * FROM some_table WHERE id IN ? AND status = ? AND author = ?";
 	$this->db->query($sql, array(array(3, 6), 'live', 'Rick'));
 
+The resulting query will be::
+
+	SELECT * FROM some_table WHERE id IN (3,6) AND status = 'live' AND author = 'Rick'
 
 The secondary benefit of using binds is that the values are
 automatically escaped, producing safer queries. You don't have to