Issue Description:

Examples:

struct gg<G: T<Int>> {} // "key.inheritedtypes > key.name" is "T<Int>>"

func bg<T: G<Void>>() // "key.inheritedtypes > key.name" is "G<Void>>"

This doesn't occur unless the inherited type is generic as well. It also only applies to the last inherited type, so for

<T, U: G<T>, V: G<U>>

only the inherited type `G<U>` is returned by SourceKit as `G<U>>`.

Also, this bug can be sidestepped by adding a space before the last `>`. So adding a space to the previous example

<T, U: G<T>, V: G<U> >

correctly returns just `G<U>` as the inherited type.

I suspect an off-by-one bug when fetching the inheritance type from the source code.