step-8: improve header whitespace.

diff --git a/examples/step-8/step-8.cc b/examples/step-8/step-8.cc
index f3349006423fdd7d9475c09829029cb517662ed9..dd95346468f68b3947545a062d9bce458e14a924 100644 (file)
--- a/examples/step-8/step-8.cc
+++ b/examples/step-8/step-8.cc
@@ -25,6 +25,7 @@
 #include <deal.II/base/quadrature_lib.h>
 #include <deal.II/base/function.h>
 #include <deal.II/base/tensor.h>
+
 #include <deal.II/lac/vector.h>
 #include <deal.II/lac/full_matrix.h>
 #include <deal.II/lac/sparse_matrix.h>
@@ -32,15 +33,19 @@
 #include <deal.II/lac/solver_cg.h>
 #include <deal.II/lac/precondition.h>
 #include <deal.II/lac/affine_constraints.h>
+
 #include <deal.II/grid/tria.h>
 #include <deal.II/grid/grid_generator.h>
 #include <deal.II/grid/grid_refinement.h>
 #include <deal.II/grid/tria_accessor.h>
 #include <deal.II/grid/tria_iterator.h>
+
 #include <deal.II/dofs/dof_handler.h>
 #include <deal.II/dofs/dof_accessor.h>
 #include <deal.II/dofs/dof_tools.h>
+
 #include <deal.II/fe/fe_values.h>
+
 #include <deal.II/numerics/vector_tools.h>
 #include <deal.II/numerics/matrix_tools.h>
 #include <deal.II/numerics/data_out.h>