New JEP: Concise Method Bodies

[Brian Goetz]

> I think moral-hazard arguments also deserve a bit of thought.

I was thinking moral hazard too, but in the other direction.  The higher 
the per-method overhead, the more likely people are to write poorly 
factored methods and to duplicate code, because declaring another method 
feels too heavy.

Just as `var` lowers the barrier to pulling a subexpression into a 
variable with a name, increasing readability, lowering the bar to 
declaring a method does the same.