message: [easy][safety-rules] fix the error representation
  Closes:
diff: @@ -23,9 +23,9 @@ pub enum Error {
  InternalError(String),
  #[error("No next_epoch_state specified in the provided Ledger Info")]
  InvalidLedgerInfo,
  - #[error("Invalid proposal: {}", {0})]
  + #[error("Invalid proposal: {0}")]
  InvalidProposal(String),
  - #[error("Invalid QC: {}", {0})]
  + #[error("Invalid QC: {0}")]
  InvalidQuorumCertificate(String),
  #[error("{0} is not set, SafetyRules is not initialized")]
  NotInitialized(String),
  