reduce string ranges

[Christian Kamm]

Brian Myers wrote:
> The following:
> 
> int main(char[][] args)
> {
>     string[] tstarr = ["one", "two", "three"];
>     writefln(reduce!("a ~ b")("", tstarr));
> }
> 
> gives the following error message:
> 
> c:\dmd\bin\..\src\phobos\std\algorithm.d(289): Error: functions cannot
> return static array invariant(char[0u])

This is just the old problem that string literals are static arrays. Reduce
expects its return type to have the same type as the first argument, which
is invariant(char[0]) in your case. Replace "" by ""[] and the code
compiles.