Rating infos on blog detail page are missing

How to reproduce

• Create a blog with an entry
• Rate the blog entry using different users to create an average rating
• Open blog details page
  => OK: average rating is dispalyed
  => NOK: no information is displayed about the sample size

This info is actually there in the HTML code but was disabled by a rule specified for the library site. The solution is to limit the library rule only to the library site.