message: Fix multiline string formatting issues in `reactor.rs`
diff: @@ -397,10 +397,9 @@ where
  if crate::QUEUE_DUMP_REQUESTED.load(Ordering::SeqCst) {
  debug!("dumping event queue as requested");
  let output_fn = "queue_dump.json";
  - let mut serializer = serde_json::Serializer::pretty(File::create(output_fn).expect(
  - "could not create output file for queue
  - snapshot",
  - ));
  + let mut serializer = serde_json::Serializer::pretty(
  + File::create(output_fn).expect("could not create output file for queue snapshot"),
  + );
  self.scheduler
  .snapshot(&mut serializer)
  