Make line break before '}' optional

#KT-6142 Fixed

idea/testData/formatter/NewLineForRBrace.kt

@@ -0,0 +1,27 @@
+enum class E1 { F S T }
+
+enum class E2 { F S T}
+
+enum class E3 {
+    F S T}
+
+class C1 {}
+
+class C2 {
+    fun test() {}}
+
+object O1 {}
+
+object O2 {
+    fun test() {}}
+
+trait T1 {}
+
+trait T2 {
+    val some = 1}
+
+enum class E1 {
+    EE1 {}
+    EE2 {
+        val some = 1}
+}