Allow empty blocks for classes and function literals

idea/testData/formatter/EmptyBlocks.after.inv.kt

@@ -0,0 +1,41 @@
+class Test {}
+
+class Other {
+    class object {}
+}
+
+object TestObject {}
+
+val testVal = {}
+
+val testObject = object {}
+
+fun foo(f: (String) -> Unit = {}) = {}
+
+fun call() {
+    foo({})
+    foo {}
+}
+
+class Test1 {
+}
+
+class Other1 {
+    class object {
+    }
+}
+
+object TestObject1 {
+}
+
+val testVal1 = { }
+
+val testObject1 = object {
+}
+
+fun foo1(f: (String) -> Unit = { }) = { }
+
+fun call1() {
+    foo1({ })
+    foo1 { }
+}