modules register themes?

Maybe – though I’ll leave that to someone who knows what it is, that should be made clear. This patch makes it clear enough not to confuse me, which is all I wanted to avoid for the next person viewing the docs.

I thought it was fairly obvious that the wrong word was used unintentionally, rather than the original author was being unclear, so I didn’t attempt a rewrite.

Any suggestions?

If you would rather leave this as obviously wrong in order to encourage someone to rewrite the rest of it then I will have to wait.
I was trying to use the documentation to learn what the answer should be, rather than trying to spot errors.