message: Adding ParGridFunction::operator=(ParGridFunction&) method just to be certain
diff: @@ -82,6 +82,10 @@ public:
  ParGridFunction &operator=(const Vector &v)
  { GridFunction::operator=(v); return *this; }
  + /// Copy the data from a ParGridFunction to the ParGridFunction data.
  + ParGridFunction &operator=(const ParGridFunction &v)
  + { GridFunction::operator=(v); return *this; }
  +
  ParFiniteElementSpace *ParFESpace() const { return pfes; }
  virtual void Update();
  