"I specified that strings within a Unicode escape must be separated by only one space."
Drat. I thought of it as a nifty way to split a large chunk of escape sequences over multiple lines. It's not like I was ever going to want to do that, though.
That was actually never possible, because of the way the parser chunks the stream into lines and then operates on each individual line. I had considered making it possible... but I think that would have been too confusing. And it would have been far too little gain for too much work...