Rails3: use String#html_safe for render_project_hierarchy() at ProjectsHelper.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@6493 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/helpers/projects_helper.rb

@@ -80,7 +80,7 @@ module ProjectsHelper
       s << ("</li></ul>\n" * ancestors.size)
       @project = original_project
     end
-    s
+    s.html_safe
   end
 
   # Returns a set of options for a select field, grouped by project.