haskell / haskell/stylish-haskell

Line breaking support for function definitions

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Dominant language
Haskell
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Description

When there is a definition like
```Haskell
myFun :: a -> a -> a -> a -> a -> a -> a -> a -> a -> a -> a -> a -> a -> a -> a -> a -> a -> a -> a -> a -> a -> a -> a
myFun = undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined
```
Stylish-haskell doesn't touch this definition even with `columns: 80` config. It will be great if stylish-haskell can format this kind of long expression and gives something like
```Haskell
myFun :: a -> a -> a -> a -> a -> a -> a -> a -> a -> a -> a -> a -> a -> a -> a
-> a -> a -> a -> a -> a -> a -> a -> a -> a
myFun = undefined undefined undefined undefined undefined undefined undefined
undefined undefined undefined undefined
```

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