create fixed length string of characters

[Renato Athaydes]

On Friday, 16 August 2024 at 13:30:53 UTC, IchorDev wrote:
> On Friday, 16 August 2024 at 11:37:08 UTC, Nick Treleaven wrote:
>> On Friday, 16 August 2024 at 06:15:18 UTC, Bruce wrote:
>> ```d
>> string s = a.dup; // copy to heap, assuming you need the data 
>> to escape (use a[] otherwise)
>> s.writeln();
>> ```
>
> I think you meant `idup`? `dup` will make it mutable.

I found the docs of `dup` here: 
https://dlang.org/library/std/container/array/array.html

But not `idup`. Where does that come from?