[examples] Fix matrix/vector types of examples

The nested matrix and vector types should correspond
to the index tree of the basis. Here, this is not the
case since `Field*<T,*>` was used instead of `T`.
While this is in many cases no problem, it may fail
if the matrix is recursively traversed with `IsNumber`
as termination criterion.

examples/poisson-mfem.cc

@@ -101,9 +101,9 @@ int main (int argc, char *argv[])
   //   Stiffness matrix and right hand side vector
   /////////////////////////////////////////////////////////
 
-  using Matrix = Dune::Matrix<Dune::BCRSMatrix<Dune::FieldMatrix<double,1,1> > >;
-  using Vector = Dune::BlockVector<Dune::BlockVector<Dune::FieldVector<double,1> > >;
-  using BitVector = Dune::BlockVector<Dune::BlockVector<Dune::FieldVector<char,1> > >;
+  using Matrix = Dune::Matrix<Dune::BCRSMatrix<double> >;
+  using Vector = Dune::BlockVector<Dune::BlockVector<double> >;
+  using BitVector = Dune::BlockVector<Dune::BlockVector<char> >;
 
   using Functions::istlVectorBackend;
 

examples/poisson-nitsche.cc

@@ -228,8 +228,8 @@ int main (int argc, char *argv[]) try
   //   Stiffness matrix and right hand side vector
   /////////////////////////////////////////////////////////
 
-  using Vector = Dune::BlockVector<Dune::FieldVector<double,1>>;
-  using Matrix = Dune::BCRSMatrix<Dune::FieldMatrix<double,1,1>>;
+  using Vector = Dune::BlockVector<double>;
+  using Matrix = Dune::BCRSMatrix<double>;
 
   Vector rhs;
   Matrix stiffnessMatrix;

examples/stokes-taylorhood.cc

@@ -191,9 +191,9 @@ int main (int argc, char *argv[]) try
   using Matrix = MultiTypeBlockMatrix<MatrixRow0,MatrixRow1>;
   // { linear_algebra_setup_end }
 #else
-  using Vector = BlockVector<BlockVector<FieldVector<double,1> > >;
-  using BitVector = BlockVector<BlockVector<FieldVector<char,1> > >;
-  using Matrix = Dune::Matrix<BCRSMatrix<FieldMatrix<double,1,1> > >;
+  using Vector = BlockVector<BlockVector<double> >;
+  using BitVector = BlockVector<BlockVector<char> >;
+  using Matrix = Dune::Matrix<BCRSMatrix<double> >;
 #endif
 
   /////////////////////////////////////////////////////////