The first example in the Learning D book, wont compile

[Seb]

On Sunday, 25 March 2018 at 20:45:58 UTC, Ali wrote:
> Hi
>
> The first example in the Learning D book
>
> import core.thread;
> import std.stdio;
>
> void main() {
>     import std.range: iota, range;
>     write("Greeting in, ");
>     foreach(num; iota(1, 4).range) {
>         writef("%s...", num);
>         stdout.flush();
>         Thread.sleep(1.seconds);
>     }
>     writeln();
>     writeln("Hello, World");
> }
>
>
> wont compile and give this error
>
> hello.d(5): Error: module `std.range` import range not found
>
> this should be an easy issue to fix, except that googling this 
> error doesnt return anything useful

The problem is `std.range : range` - range is not a symbol of 
std.range:

---
import core.thread;
import std.stdio;

void main() {
     import std.range: iota;
     write("Greeting in, ");
     foreach(num; iota(1, 4)) {
         writef("%s...", num);
         stdout.flush();
         Thread.sleep(1.seconds);
     }
     writeln();
     writeln("Hello, World");
}
---

https://run.dlang.io/is/p9rFrS