Fix spacing after return (KT-4947)

#KT-4947 Fixed

idea/testData/formatter/ReturnExpression.after.kt

@@ -0,0 +1,39 @@
+fun test1(): Int {
+    return 1
+}
+
+fun test2(): Int {
+    return
+    1
+}
+
+fun test3(): Int {
+    return
+
+
+
+    1
+}
+
+fun test4(): Int {
+    return synchronized(this) {(): Int ->
+        return@synchronized 12
+    }
+}
+
+fun test5(): Int {
+    return synchronized(this) {(): Int ->
+        return@synchronized 12
+    }
+}
+
+fun test6(): Int {
+    return synchronized(this) {(): Int ->
+        return
+
+        @synchronized
+
+        12
+    }
+}
+

idea/testData/formatter/ReturnExpression.kt

@@ -0,0 +1,39 @@
+fun test1(): Int {
+    return     1
+}
+
+fun test2(): Int {
+    return
+    1
+}
+
+fun test3(): Int {
+    return
+
+
+
+    1
+}
+
+fun test4(): Int {
+    return synchronized(this) {(): Int ->
+        return@synchronized 12
+    }
+}
+
+fun test5(): Int {
+    return synchronized(this) {(): Int ->
+        return     @synchronized      12
+    }
+}
+
+fun test6(): Int {
+    return synchronized(this) {(): Int ->
+        return
+
+        @synchronized
+
+        12
+    }
+}
+