How to update docs

Hi PHP Doc people, I was wondering if someone could help me to get an update to the manual through? I've noticed today that the Class Constants page ( http://php.net/manual/en/language.oop5.constants.php) doesn't make any mention of the new Constant Expressions feature added in 5.6. And while it is mentioned on the new features page for 5.6 ( http://php.net/manual/en/migration56.new-features.php) I feels like the pages affected by new features should also be updated. To me this is important to make sure dev looking up this information have all the information. IE; someone new coming in to PHP want to look up how class constants work, so they go to that page in the OOP section and find that only scalar literals are allowed. But in fact, so are scalar expressions in the newest version. They might never find this information since its hidden away in the new features section of the docs. Or they might not realize that being allowed to do it on global constants, means they can do it on class constants (if they happen to go to that page as well) As such, I've gone to edit.php.net (per the instructions I found) and tried to edit the page. However it shows up in the All Files list in red, and doesn't let me save changes to create a pull request. Am I missing something obvious here? I don't see anything on the wiki about files being in red. Thanks for you time, -Ryan