message: Clarify comment in XML VTK reader
diff: @@ -762,7 +762,7 @@ void Mesh::ReadXML_VTKMesh(std::istream &input, int &curved, int &read_gf,
  }
  if (cells_xml == NULL) { MFEM_ABORT(erstr); }
  - // Currently don't support reading cell attributes from VTK mesh
  + // Currently don't support reading cell attributes from XML VTK mesh
  Array<int> cell_attributes;
  CreateVTKMesh(points, cell_data, cell_offsets, cell_types, cell_attributes,
  curved, read_gf, finalize_topo);
  