Merge doc changes; small related updates.
diff --git a/user_guide_src/source/changelog.rst b/user_guide_src/source/changelog.rst
index 44dca0d..822f2f9 100644
--- a/user_guide_src/source/changelog.rst
+++ b/user_guide_src/source/changelog.rst
@@ -603,8 +603,8 @@
 
 -  Fixed a bug (#1936) - :doc:`Migration Library <libraries/migration>` method ``latest()`` had a typo when retrieving language values.
 -  Fixed a bug (#2021) - :doc:`Migration Library <libraries/migration>` configuration file was mistakenly using Windows style line feeds.
--  Fixed a bug (#1969) - :doc:`Query Builder (Active Record) <database/query_builder>` method ``set_update_batch()`` was using the incorrect variables and would cause an error.
--  Fixed a bug (#2337) - :doc:`Email Library <libraries/email>` method ``print_debugger()`` was not using ``htmlspecialchars()`` when being shown in the browser.
+-  Fixed a bug (#1273) - ``E_NOTICE`` being generated by :doc:`Query Builder <database/query_builder>`'s ``set_update_batch()`` method.
+-  Fixed a bug (#2337) - :doc:`Email Library <libraries/email>` method ``print_debugger()`` didn't apply ``htmlspecialchars()`` to headers.
 
 Version 2.1.3
 =============
@@ -636,6 +636,7 @@
 Release Date: June 29, 2012
 
 -  General Changes
+
    -  Improved security in ``xss_clean()``.
 
 Version 2.1.1
@@ -644,14 +645,17 @@
 Release Date: June 12, 2012
 
 -  General Changes
+
    -  Fixed support for docx, xlsx files in mimes.php.
 
 -  Libraries
+
    -  Further improved MIME type detection in the :doc:`File Uploading Library <libraries/file_uploading>`.
    -  Added support for IPv6 to the :doc:`Input Library <libraries/input>`.
    -  Added support for the IP format parameter to the :doc:`Form Validation Library <libraries/form_validation>`.
 
 -  Helpers
+
    -  ``url_title()`` performance and output improved. You can now use any string as the word delimiter, but 'dash' and 'underscore' are still supported.
 
 Bug fixes for 2.1.1
@@ -707,7 +711,7 @@
 
 -  Libraries
 
-   -  Changed $this->cart->insert() in the :doc:`Cart
+   -  Changed ``$this->cart->insert()`` in the :doc:`Cart
       Library <libraries/cart>` to return the Row ID if a single
       item was inserted successfully.
    -  Added support to set an optional parameter in your callback rules
@@ -717,8 +721,7 @@
       incremental updates to your database schema.
    -  Driver children can be located in any package path.
    -  Added max_filename_increment config setting for Upload library.
-   -  Added is_unique to the :doc:`Form Validation
-      library <libraries/form_validation>`.
+   -  Added ``is_unique`` to the :doc:`Form Validation library <libraries/form_validation>`.
    -  Added $config['use_page_numbers'] to the :doc:`Pagination library <libraries/pagination>`, which enables real page numbers in the URI.
    -  Added TLS and SSL Encryption for SMTP.