The first example in the Learning D book, wont compile

[Graham Fawcett]

On Sunday, 25 March 2018 at 21:02:26 UTC, Ali wrote:
> 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

I pasted your code into Spacemacs, and it highlighted the error 
immediately. What editor are you using?

Graham