message: Improve summary nack messages
diff: @@ -257,14 +257,17 @@ export class ScribeLambda extends SequencedLambda {
  if (!existingRef || existingRef.object.sha !== content.head) {
  await this.sendSummaryNack(
  summarySequenceNumber,
  - `Proposed parent summary "${content.head}" does not match actual parent summary "${existingRef}".`,
  + // tslint:disable-next-line:max-line-length
  + `Proposed parent summary "${content.head}" does not match actual parent summary "${existingRef ? existingRef.object.sha : "n/a"}".`,
  );
  return;
  }
  +
  } else if (existingRef) {
  await this.sendSummaryNack(
  summarySequenceNumber,
  - `Proposed parent summary "${content.head}" does not match actual parent summary "${existingRef}".`,
  + // tslint:disable-next-line:max-line-length
  + `Proposed parent summary "${content.head}" does not match actual parent summary "${existingRef.object.sha}".`,
  );
  return;
  }
  