format fix

src/func.rs

@@ -348,6 +348,7 @@ pub trait MonadFailAnyExt: MonadFailAny {
     {
         <Self::W<E> as Pure>::pure(a)
     }
+
     fn fail<'a, E: 'a, A: 'a>(e: E) -> <Self::W<E> as WeakFunctor>::F<'a, A>
     where
         Self: 'a,