Move the empty subscript into the primitives section.
Move the empty subscript into the primitives section.

It’s not part of CollectionType, it’s just a weird hack.

Took the opportunity to document it at the same time.

robrix/Set,madbat/Set,madbat/Set,IngmarStein/Set,natecook1000/Set,robrix/Set,IngmarStein/Set,natecook1000/Set,natecook1000/Set,robrix/Set,madbat/Set,IngmarStein/Set