Typically I'd put that into a comment right above that line. I'd also really be inclined to install a replacement service instead so you'd get automatic restarts if you aren't very confident that you have another way into the box.
Yea, I agree. I actually was thinking before I posted this "Someone will ask about that line, I should just add the link to the comments" haha. (Just added it.)
If you read the discussion in the link, this actually does do that. It just replaces the 'empty' service with the actual tor service. So you do get automatic restarts.