message: Update fem/nonlininteg AssembleGradDiagonalPA error message
diff: @@ -57,7 +57,7 @@ void NonlinearFormIntegrator::AddMultGradPA(const Vector&,
  void NonlinearFormIntegrator::AssembleGradDiagonalPA(const mfem::Vector &g,
  mfem::Vector &diag) const
  {
  - mfem_error ("NonlinearFormIntegrator::AssembleDiagonalPA(...)\n"
  + mfem_error ("NonlinearFormIntegrator::AssembleGradDiagonalPA(...)\n"
  " is not implemented for this class.");
  }
  