Fix copy'n'paste errors in the documentation

dune/elasticity/assemblers/feassembler.hh

@@ -9,7 +9,7 @@
 #include "localfestiffness.hh"
 
 
-/** \brief A global FE assembler for problems involving functions that map into non-Euclidean spaces
+/** \brief A global FE assembler for variational problems
  */
 template <class Basis, class VectorType>
 class FEAssembler {
@@ -45,8 +45,7 @@ public:
 
     /** \brief Assemble the tangent stiffness matrix and the functional gradient together
      *
-     * This is more efficient than computing them separately, because you need the gradient
-     * anyway to compute the Riemannian Hessian.
+     * This may be more efficient than computing them separately
      */
     virtual void assembleGradientAndHessian(const VectorType& sol,
                                             Dune::BlockVector<Dune::FieldVector<double, blocksize> >& gradient,