message: fix formatting for fmt
diff: use serde::{Deserialize, Serialize};
  -use crate::{
  - ApiServerConfig, SmallNetworkConfig, StorageConfig, ROOT_VALIDATOR_LISTENING_PORT,
  -};
  +use crate::{ApiServerConfig, SmallNetworkConfig, StorageConfig, ROOT_VALIDATOR_LISTENING_PORT};
  /// Root configuration.
  #[derive(Debug, Deserialize, Serialize)]
  