message: AMR sample run.
diff: // An H(div) function file is provided in this directory for a sample run.
  // Other functions [H1, H(curl), and L2] can be generated using existing MFEM
  // example codes in the "../../examples/" directory.
  +//
  // Sample run:
  // field-interp
  // field-interp -ft 3
  // field-interp -m1 triple-pt-1.mesh -s1 triple-pt-1.gf -m2 triple-pt-2.mesh -ft 1
  +// field-interp -m2 ../meshing/amr-quad-q2.mesh -ft 0 -r 1
  #include "mfem.hpp"
  #include <fstream>
  