idea/testData/formatter/By.kt - third_party/github/JetBrains/kotlin - Git at Google

 class Bar(val r: Runnable) : Runnable    by  r
 class Foo {
     val bar   by    lazy { "" }
 }
	class Bar(val r: Runnable) : Runnable by r
	class Foo {
	val bar by lazy { "" }
	}