Improvements to std.typecons.Nullable

[BLM768]

On Tuesday, 8 October 2013 at 19:20:05 UTC, Brad Anderson wrote:
>
> The wiki has a pretty good guide of the overall process: 
> http://wiki.dlang.org/Pull_Requests

That answers most of my questions, but it seems a little... 
informal. I guess the formal review process doesn't really apply 
to minor API changes.
If it's really that easy, I'll just go for it.