chore: bump scalafmt to 3.9.7 (#1916)

testkit/src/main/scala/org/apache/pekko/testkit/TestActorRef.scala

@@ -34,14 +34,14 @@ import pekko.pattern.ask
 class TestActorRef[T <: Actor](_system: ActorSystem, _props: Props, _supervisor: ActorRef, name: String)
     extends LocalActorRef({
         val disregard = _supervisor match {
-          case l: LocalActorRef => l.underlying.reserveChild(name)
+          case l: LocalActorRef       => l.underlying.reserveChild(name)
           case r: RepointableActorRef =>
             r.underlying match {
               case _: UnstartedCell =>
                 throw new IllegalStateException(
                   "cannot attach a TestActor to an unstarted top-level actor, ensure that it is started by sending a message and observing the reply")
               case c: ActorCell => c.reserveChild(name)
-              case o =>
+              case o            =>
                 _system.log.error(
                   "trying to attach child {} to unknown type of supervisor cell {}, this is not going to end well",
                   name,

testkit/src/main/scala/org/apache/pekko/testkit/TestEventListener.scala

@@ -564,9 +564,9 @@ class TestEventListener extends Logging.DefaultLogger {
       Seq(classOf[Mute], classOf[UnMute], classOf[DeadLetter], classOf[UnhandledMessage], classOf[Dropped])
         .foreach(bus.subscribe(context.self, _))
       sender() ! LoggerInitialized
-    case Mute(filters)   => filters.foreach(addFilter)
-    case UnMute(filters) => filters.foreach(removeFilter)
-    case event: LogEvent => if (!filter(event)) print(event)
+    case Mute(filters)             => filters.foreach(addFilter)
+    case UnMute(filters)           => filters.foreach(removeFilter)
+    case event: LogEvent           => if (!filter(event)) print(event)
     case DeadLetter(msg, snd, rcp) =>
       if (!msg.isInstanceOf[Terminate]) {
         val event = Warning(rcp.path.toString, rcp.getClass, msg)

testkit/src/main/scala/org/apache/pekko/testkit/TestKit.scala

@@ -129,7 +129,7 @@ class TestActor(queue: BlockingDeque[TestActor.Message]) extends Actor {
     case Watch(ref)          => context.watch(ref)
     case UnWatch(ref)        => context.unwatch(ref)
     case SetAutoPilot(pilot) => autopilot = pilot
-    case spawn: Spawn =>
+    case spawn: Spawn        =>
       val actor = spawn(context)
       for (s <- spawn.strategy) supervisorStrategy(actor) = s
       queue.offerLast(RealMessage(actor, self))

testkit/src/main/scala/org/apache/pekko/testkit/javadsl/TestKit.scala

@@ -71,7 +71,7 @@ class TestKit(system: ActorSystem) {
   def duration(s: String): FiniteDuration = {
     Duration.apply(s) match {
       case fd: FiniteDuration => fd
-      case _ =>
+      case _                  =>
         throw new IllegalArgumentException("duration() is only for finite durations, use Duration.Inf() and friends")
     }
   }

testkit/src/test/scala/org/apache/pekko/testkit/CoronerSpec.scala

@@ -88,7 +88,7 @@ class CoronerSpec extends AnyWordSpec with Matchers {
 
             def recursiveLock(locks: List[ReentrantLock]): Unit = {
               locks match {
-                case Nil => ()
+                case Nil          => ()
                 case lock :: rest => {
                   ready.release()
                   proceed.acquire()

testkit/src/test/scala/org/apache/pekko/testkit/TestActorRefSpec.scala

@@ -80,9 +80,9 @@ object TestActorRefSpec {
   class SenderActor(replyActor: ActorRef) extends TActor {
 
     def receiveT = {
-      case "complex"  => replyActor ! "complexRequest"
-      case "complex2" => replyActor ! "complexRequest2"
-      case "simple"   => replyActor ! "simpleRequest"
+      case "complex"      => replyActor ! "complexRequest"
+      case "complex2"     => replyActor ! "complexRequest2"
+      case "simple"       => replyActor ! "simpleRequest"
       case "complexReply" => {
         counter -= 1
       }

testkit/src/test/scala/org/apache/pekko/testkit/metrics/MetricsKit.scala

@@ -164,7 +164,7 @@ private[pekko] trait MetricsKit extends MetricsKitOps {
     import pekko.util.ccompat.JavaConverters._
     registry.getMetrics.asScala.find(_._1 == key).map(_._2) match {
       case Some(existing: M) => existing
-      case Some(_) =>
+      case Some(_)           =>
         throw new IllegalArgumentException(
           "Key: [%s] is already for different kind of metric! Was [%s], expected [%s]"
             .format(key, metric.getClass.getSimpleName, tag.runtimeClass.getSimpleName))