Add Span to arena_types! for decoding &'tcx [Span]
Add Span to arena_types! for decoding &'tcx [Span]

graydon/rust,graydon/rust,aidancully/rust,aidancully/rust,aidancully/rust,aidancully/rust,aidancully/rust,graydon/rust,graydon/rust,graydon/rust,aidancully/rust,graydon/rust