Fix up tests for empty impls

Author: topecongiro

tests/target/big-impl-block.rs

@@ -80,5 +80,4 @@ where
     S: event::Stream,
     F: for<'t> FnMut(transform::Api<'t, Stream<ContentStream<S>>>) -> transform::Api<'t, X>,
     X: event::Stream,
-{
-}
+{}

tests/target/impls.rs

@@ -134,13 +134,11 @@ mod m {
 
 impl<BorrowType, K, V, NodeType, HandleType>
     Handle<NodeRef<BorrowType, K, V, NodeType>, HandleType>
-{
-}
+{}
 
 impl<BorrowType, K, V, NodeType, HandleType> PartialEq
     for Handle<NodeRef<BorrowType, K, V, NodeType>, HandleType>
-{
-}
+{}
 
 mod x {
     impl<A, B, C, D> Foo
@@ -149,8 +147,7 @@ mod x {
         B: 'static,
         C: 'static,
         D: 'static,
-    {
-    }
+    {}
 }
 
 impl<ConcreteThreadSafeLayoutNode: ThreadSafeLayoutNodeFoo>