Should we have prettier string printing for exceptions and std elemts?

[jmh530]

On Sunday, 8 October 2017 at 21:48:05 UTC, Fra Mecca wrote:
>
> One example is container.Array
>

Ideally you would format the container as a string and then 
writeln that. There are some examples in std.format's 
documentation of how to make it prettier. I relied on that to do 
the same for mir's ndslices:
https://github.com/libmir/numir/pull/10