reduce condition nesting

[Adam D. Ruppe]

On Saturday, 25 November 2017 at 22:45:03 UTC, Ali Çehreli wrote:
> Despite 'lazy', apparently my failed attempt had eager 
> arguments:
>
> void when(lazy bool[] args...) {

Yeah, I'm tempted to say that is a bug... I doubt anyone has 
combined lazy with T[]... like this before - especially since the 
language has that other syntax to cover this case.