message: Adding comment to explain placement of call to deletion method
diff: @@ -3055,6 +3055,7 @@ bool ParMesh::NonconformingDerefinement(Array<double> &elem_error,
  long glob_size = ReduceInt(derefs.Size());
  if (!glob_size) { return false; }
  + // Destroy face-neighbor data only when actually de-refining.
  DeleteFaceNbrData();
  pncmesh->Derefine(derefs);
  