Regression: copying and pasting a selection ending in a new line throws an exception

#598 introduces a regression that causes `ClipboardTests$CopyTests$WhenUserMakesSelectionEndingInNewLineCharacter.copyingShouldNotThrowException` to throw an OOBE. The build in that PR still passed despite this error being thrown; hence, why it wasn't caught before.

**Correction:** the error is thrown by the `paste` method.