[swift-evolution] [Pitch] .swiftDoc files instead of inline docs

[Ben Rimmington]

> On 8 Nov 2017, at 18:57, Erica Sadun wrote:
> 
> Colocation of docs with the material they document is valuable to me and I presume anyone updating code. If anything, it would be nice if Xcode provided a show/hide doc headers toggle though.

[Xcode 9.1]

Editor > Code Folding > Fold Comment Blocks

Editor > Code Folding > Fold Methods & Functions