joomla/joomla-cms — pull request #554 by hans2103 (2012-11-17 05:08:53+00:00)
Title: Update components/com_content/views/article/tmpl/default.php

Adding canonical URL to category blog view created from the read-more link.

without the patch you don't see in the html head of the source of your category_blog view
with the patch you do see in the html head of the source of your category_blog view