It is not suppose to find multiline imports. The value of the preference is not directly accessible by the user. In code, `serializeImports` and `deserializeImports` should be used to got between Array[String] and String.
It is stored as valid import code, so it doesn't have to be recreated everytime it is used (and it needs to be serialized to String anyway).

I'll re-organize the scaladoc to make it more clear.