Minor adjustments in the changelog
diff --git a/user_guide_src/source/changelog.rst b/user_guide_src/source/changelog.rst
index 7ec417d..7afe8be 100644
--- a/user_guide_src/source/changelog.rst
+++ b/user_guide_src/source/changelog.rst
@@ -58,7 +58,7 @@
    -  Adding $escape parameter to the order_by function, this enables ordering by custom fields.
    -  MySQLi driver now uses mysqli_get_server_info() for server version checking.
    -  MySQLi driver now supports persistent connections when running on PHP >= 5.3.
-   -  Added dsn if the group connections in the config use PDO or any driver which need DSN.
+   -  Added 'dsn' configuration setting for drivers that support DSN strings (PDO, PostgreSQL, Oracle, ODBC, CUBRID).
    -  Improved PDO database support.
    -  Added Interbase/Firebird database support via the "interbase" driver
    -  Added an optional database name parameter to db_select().
@@ -252,11 +252,9 @@
       override them.
    -  Removed CI_CORE boolean constant from CodeIgniter.php (no longer Reactor and Core versions).
 
-
 Bug fixes for 2.1.0
 -------------------
 
-
 -  Fixed #378 Robots identified as regular browsers by the User Agent
    class.
 -  If a config class was loaded first then a library with the same name
@@ -1255,7 +1253,7 @@
 
 -  Added a language key for valid_emails in validation_lang.php.
 -  Amended fixes for bug (#3419) with parsing DSN database connections.
--  Moved the _has_operators() function (#4535) into DB_driver from
+-  Moved the _has_operator() function (#4535) into DB_driver from
    DB_active_rec.
 -  Fixed a syntax error in upload_lang.php.
 -  Fixed a bug (#4542) with a regular expression in the Image library.