layout rule infelicity

[George Russell]

I like layout but I think the existing rules are too complicated.  Unfortunately it's
difficult to do anything with them without breaking vast swathes of existing code,
so we'll just have to put up with them.

The reason I think layout is better than using {'s and ,'s is that humans
use the layout to group the structure anyway, which means you can have 
confusing situations where a structure looks alright to a human but not
to a computer.