The first example in the Learning D book, wont compile

[Ali]

On Sunday, 25 March 2018 at 20:52:29 UTC, Ali wrote:
> On Sunday, 25 March 2018 at 20:45:58 UTC, Ali wrote:
> I now see my typo, should be retro, not range

We need better IDEs, this would have been easily highlighted by a 
good ide