Christopher O'Brien

``` fatal error: unexpectedly found nil while unwrapping an Optional value Current stack trace: 0 libswiftCore.dylib 0x000000010a4e1130 swift_reportError + 129 1 libswiftCore.dylib 0x000000010a4fdb50 _swift_stdlib_reportFatalError + 60 2 libswiftCore.dylib 0x000000010a2ee250 specialized...

I understand this might be very complicated to make work, due to how TypedDict subclassing works, but I felt it's worth a shot to file this as an RFE anyway....

I only happened to know to use string literals for field docstrings by having seen it that way once before long ago. I'm not sure I've ever seen it declared...