J2K: do not drop formatting for expressions with operator

j2k/testData/fileOrElement/enum/runnableImplementation.kt

@@ -2,6 +2,7 @@ internal enum class Color : Runnable {
     WHITE, BLACK, RED, YELLOW, BLUE;
 
     override fun run() {
-        println("name()=" + name + ", toString()=" + toString())
+        println("name()=" + name +
+                ", toString()=" + toString())
     }
 }