message: ZeroWrap -> ZeroWrapAMG for clarity
diff: @@ -196,7 +196,7 @@ MatrixFreeAuxiliarySpace::MatrixFreeAuxiliarySpace(
  The auxiliary space solves in general, and this one in particular,
  seem to be quite sensitive to handling of boundary conditions. Note
  - some careful choices for Matrix::DiagonalPolicy and the ZeroWrap
  + some careful choices for Matrix::DiagonalPolicy and the ZeroWrapAMG
  object, as well as the use of a single CG iteration (instead of just
  an AMG V-cycle). Just a V-cycle may be more efficient in some cases,
  but we recommend the CG wrapper for robustness here. */
  @@ -308,13 +308,14 @@ void MatrixFreeAuxiliarySpace::SetupVCycle()
  aspacewrapper = lor_pc;
  }
  -class ZeroWrap : public Solver
  +class ZeroWrapAMG : public Solver
  {
  public:
  #ifdef MFEM_USE_AMGX
  - ZeroWrap(HypreParMatrix& mat, Array<int>& ess_tdof_list_, const bool useAmgX) :
  + ZeroWrapAMG(HypreParMatrix& mat, Array<int>& ess_tdof_list_,
  + const bool useAmgX) :
  #else
  - ZeroWrap(HypreParMatrix& mat, Array<int>& ess_tdof_list_) :
  + ZeroWrapAMG(HypreParMatrix& mat, Array<int>& ess_tdof_list_) :
  #endif
  Solver(mat.Height()), ess_tdof_list(ess_tdof_list_)
  {
  @@ -350,7 +351,7 @@ public:
  void SetOperator(const Operator&) { }
  - ~ZeroWrap()
  + ~ZeroWrapAMG()
  {
  delete amg_;
  }
  @@ -366,9 +367,9 @@ void MatrixFreeAuxiliarySpace::SetupAMG(int system_dimension)
  {
  // boundary condition tweak for G-space solver
  #ifdef MFEM_USE_AMGX
  - lor_pc = new ZeroWrap(*lor_matrix, ess_tdof_list, useAmgX);
  + lor_pc = new ZeroWrapAMG(*lor_matrix, ess_tdof_list, useAmgX);
  #else
  - lor_pc = new ZeroWrap(*lor_matrix, ess_tdof_list);
  + lor_pc = new ZeroWrapAMG(*lor_matrix, ess_tdof_list);
  #endif
  }
  else
  