message: Fix a doxygen warning in class PetscParVector.
diff: @@ -104,6 +104,7 @@ public:
  PetscParVector(const PetscParVector &y);
  /** @brief Creates a PetscParVector from a Vector
  + @param[in] comm MPI communicator on which the new object lives
  @param[in] _x The mfem Vector (data is not shared)
  @param[in] copy Whether to copy the data in _x or not */
  PetscParVector(MPI_Comm comm, const Vector &_x, bool copy = false);
  