Replaces <option value=""></option> which is not HTML5 valid (#15191).

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@12237 e93f8b46-1217-0410-a6f0-8f06a7374b81
Upgrade CodeRay to 1.1.0 (#8253).

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@12238 e93f8b46-1217-0410-a6f0-8f06a7374b81