message: correcting an error message
diff: @@ -392,14 +392,12 @@ impl MainReactor {
  }
  SyncInstruction::BlockExec { block, .. } => {
  let block_hash = block.id();
  - error!(
  + let msg = format!(
  "BlockExec should be unreachable in CatchUp mode: {}",
  block_hash
  );
  - return CatchUpInstruction::Shutdown(
  - "block_synchronizer is initialized for potentially executable block"
  - .to_string(),
  - );
  + error!("{}", msg);
  + return CatchUpInstruction::Shutdown(msg);
  }
  SyncInstruction::CaughtUp => {
  match self.linear_chain.highest_block() {
  