a34bcd70b2
Remove `..` from return type notation `@nikomatsakis` and I decided that using `..` in the return-type notation syntax is probably overkill. r? `@eholk` since you reviewed the last one Since this is piggybacking now totally off of a pre-existing syntax (parenthesized generics), let me know if you need any explanation of the logic here, since it's a bit more complicated now.