This is nothing you can do about this (the error is in the other fork). Nevertheless, I suggest you and the other forks to work together by sending each other pull requests or even using a shared repository.
You can contact the other forks, or simply merge their fixes here without an explicit pull request.
Hi, I just found out that I commented on a typo that is not present in this fork.
The reason is that the website http://diveintohtml5.info/about.html is pointing to this repository, even though that website is using publishing the pages in the fork at https://github.com/jonathantneal/diveintohtml5/.
This is nothing you can do about this (the error is in the other fork). Nevertheless, I suggest you and the other forks to work together by sending each other pull requests or even using a shared repository.
You can contact the other forks, or simply merge their fixes here without an explicit pull request.