message: Add comment for magic number.
diff: @@ -193,7 +193,7 @@ void DGTraceIntegrator::SetupPA(const FiniteElementSpace &fes, FaceType type)
  else if ( face.IsOfFaceType(type) )
  {
  FaceElementTransformations &T =
  - *fes.GetMesh()->GetFaceElementTransformations(f,5);
  + *fes.GetMesh()->GetFaceElementTransformations(f,5); // Elem1 and Loc1
  for (int q = 0; q < nq; ++q)
  {
  // Convert to lexicographic ordering
  