It's being discussed here (along with some alternate syntax ideas):
https://github.com/jashkenas/coffee-script/issues/1495
The above link is actually a discussion about Dart’s “Monocle Moustache,” so I console myself that when people say it’s ugly, they mean the moustache and not significant whitespace :-)
I've been amazed at how much interest there has been in this. Every time I think it's over, more people pile in. The only catch is: there are a couple of people who still need to be convinced, and they're actually the important ones. I'm pretty sure that a pull request for this would not be accepted.