[Haskell-cafe] Hyperlinked source - was: Re: sum $ map f xs ... ghc-7.10 performance regression?

[Johannes Waldmann]

> According to the source code [...]
> https://hackage.haskell.org/package/base-4.8.1.0/docs/src/Data.Foldable.html#Foldable

Ah - source code is hyperlinked! Finally!
I want that! How does this work?

- J.W.