Formatting changes to conform to the new Elm style guide.

The Elm style guide is a work in progress:
https://gist.github.com/laszlopandy/c3bf56b6f87f71303c9f

I am using this repository to test how it looks on real code.
@evancz 
Does it really look bad when there are multiple args?

```haskell
append [
        "snakes on a plane",
        "stacks on stacks",
        "cats with bats"
    ]
    [
        "dates on crates",
        "drink from the sink",
        "eat the treat"
    ]

```