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kotlinlang

Hello! Just a quick question: if I want to use a Kotlin File() with a PrintWriter, should I close it afterwards? The dev guide doesn't bother to do so (<https://developer.android.com/training/data-storage/files>).

Here is what I have:
```
   fun writeToLog(s: String) {
        val logFile = File(c.filesDir, FILENAME)
        logFile.printWriter().use {
            it.print(s)
            it.close()
        }
    }
```

Is the close() unnecessary?