This commented out line is different from the original, which is confusing.

In general, now that you are using a version control system that makes it easy to track not only the code changes but also provide detailed commentary on the how and why, it's better to not leave old lines of code as comments.  The github-workflow way to do this is to put a summary of the radiation working group decision into the pull request discussion (complete with links to the twiki page), along with a short (could be one or two line) summary of what was done in the code to effect the change.