Allow empty single-line bodies in property accessors

idea/testData/formatter/PropertyAccessors.after.kt

@@ -13,3 +13,11 @@ class Hi {
 
     var badNoType get() = 1
 }
+
+class EmptyProperties {
+    var newline: String
+        get() {
+            return ""
+        }
+        set(value) {}
+}

idea/testData/formatter/PropertyAccessors.kt

@@ -19,3 +19,9 @@ get() = 1
 
     var badNoType get() = 1
 }
+
+class EmptyProperties {
+    var newline: String
+        get() { return "" }
+        set(value) {}
+}