Unwanted recursive expansion

[Luc J. Bourhis via Digitalmars-d]

On Thursday, 15 January 2015 at 13:14:41 UTC, Daniel Kozák via 
Digitalmars-d wrote:
> This is ok, there is really recursive expansion here, I guess 
> you want something like this?
>
> [...]

Thanks for this fix. But could you explain to me why there is a 
recursive expansion?