message: Replace device sample run with a better one.
diff: // ex9 -pa -m ../data/periodic-cube.mesh -d cuda
  // ex9 -ea -m ../data/periodic-cube.mesh -d cuda
  // ex9 -fa -m ../data/periodic-cube.mesh -d cuda
  -// ex9 -pa -m ../data/fichera-amr.mesh -dt 0.0001 -tf 0.01 -d cuda
  +// ex9 -pa -m ../data/amr-quad.mesh -p 1 -r 2 -dt 0.002 -tf 9 -d cuda
  //
  // Description: This example code solves the time-dependent advection equation
  // du/dt + v.grad(u) = 0, where v is a given fluid velocity, and
  