GC/nogc status in docs

[Atila Neves]

On Thursday, 9 July 2020 at 12:55:45 UTC, aberba wrote:
> Has there been any consideration on tagging Phobos function as 
> either GC or no-GC depending on how they behave for general 
> awareness when reading the docs?
>
> I'm thinking it could be useful to know what you get.

I mentored work on adding @nogc information to every function in 
Phobos. It's not done yet, but it's nearly there.