add some notes

git-svn-id: https://svn.dealii.org/trunk@28494 0785d39b-7218-0410-832d-ea1e28bc413d

diff --git a/deal.II/examples/step-49/doc/intro.dox b/deal.II/examples/step-49/doc/intro.dox
index 22fefd294d779a0e4a13352ae5a148ce279aaafa..4c51a772c3c52e69aed510c03200ec8b0833d7ed 100644 (file)
--- a/deal.II/examples/step-49/doc/intro.dox
+++ b/deal.II/examples/step-49/doc/intro.dox
@@ -249,4 +249,6 @@ above. This is the output from grid_4():
   - change boundary indicators
   - relax inner vertices
 - Database of unstructured meshes for convergence studies
-- GridTools::extract_boundary_mesh 
+- discuss GridTools::extract_boundary_mesh 
+- how to remove or disable a cell inside a mesh
+