message: documentation of vectors used in PA struct
diff: @@ -1191,6 +1191,18 @@ protected:
  DenseMatrix DSh, DS, Jrt, Jpr, Jpt, P, PMatI, PMatO;
  // PA extension
  + // E: E-vector for TMOP-energy
  + // O: E-Vector or Q-Vector of 1.0
  + // W: Weight wector of R^t. Constructed as PA.R^T * PA.O
  + // X0: E-vector for initial nodal coordinates used for limiting.
  + // H: Q-Vector for Hessian associated with the metric term.
  + // C0: Q-Vector for spatial weight used for the limiting term.
  + // LD: E-Vector constructed using limiting distance grid function (delta).
  + // H0: Q-Vector for Hessian associated with the limiting term.
  +
  + // maps: Dof2Quad map for fespace associate with nodal coordinates.
  + // maps_lim: Dof2Quad map for fespace associated with the limiting distance
  + // grid function.
  struct
  {
  bool enabled;
  