message: Make nothing message better
diff: @@ -52,8 +52,8 @@ impl TraceEvent {
  description: "Detach child".to_string(),
  ..Default::default()
  },
  - _ => TraceEvent {
  - description: "Unexpected action".to_string(),
  + TracerAction::Nothing => TraceEvent {
  + description: "Do nothing".to_string(),
  ..Default::default()
  },
  }
  