Change in let-formatting

[sjakobi]

96921f0 changed the formatting of some let-expressions:

What was previously formatted as

let attribute
    : Text → Text → { mapKey : Text, mapValue : Text }
    = λ(key : Text) → λ(value : Text) → { mapKey = key, mapValue = value }

in  attribute

is now formatted as

let attribute
    : Text → Text → { mapKey : Text, mapValue : Text } =
    λ(key : Text) → λ(value : Text) → { mapKey = key, mapValue = value }

in  attribute

Personally I think the old formatting was a bit nicer.