Improve s.u.Using suppression order

Change `scala.util.Using` to have `scala.util.control.ControlThrowable` be suppressed by non-fatal exceptions (`scala.util.control.NonFatal`).

Author: NthPortal

library/src/scala/util/Using.scala

@@ -125,8 +125,8 @@ import scala.util.control.{ControlThrowable, NonFatal}
  * - `java.lang.LinkageError`
  * - `java.lang.InterruptedException` and `java.lang.ThreadDeath`
  * - [[scala.util.control.NonFatal fatal exceptions]], excluding `scala.util.control.ControlThrowable`
+ * - all other exceptions, excluding `scala.util.control.ControlThrowable`
  * - `scala.util.control.ControlThrowable`
- * - all other exceptions
  *
  * When more than two exceptions are thrown, the first two are combined and
  * re-thrown as described above, and each successive exception thrown is combined
@@ -265,9 +265,9 @@ object Using {
  case _: VirtualMachineError => 4
  case _: LinkageError => 3
  case _: InterruptedException | _: ThreadDeath => 2
- case _: ControlThrowable => 0
+ case _: ControlThrowable => -1 // below everything
  case e if !NonFatal(e) => 1 // in case this method gets out of sync with NonFatal
- case _ => -1
+ case _ => 0
  }
  @inline def suppress(t: Throwable, suppressed: Throwable): Throwable = { t.addSuppressed(suppressed); t }