More comment.

git-svn-id: https://svn.dealii.org/trunk@9762 0785d39b-7218-0410-832d-ea1e28bc413d

diff --git a/deal.II/deal.II/include/grid/tria_accessor.h b/deal.II/deal.II/include/grid/tria_accessor.h
index 7e2632f3b14a75dd23536142c3e7dfcfc354cefe..a2908ea61512a52f57e350a30cdcb1a868fa65c9 100644 (file)
--- a/deal.II/deal.II/include/grid/tria_accessor.h
+++ b/deal.II/deal.II/include/grid/tria_accessor.h
@@ -2558,7 +2558,11 @@ class CellAccessor :  public TriaObjectAccessor<dim,dim>
                                       * @p true, and reversed otherwise.
                                       *
                                       * Fortunately, this is only very rarely
-                                      * of concern.
+                                      * of concern, since one is usually only
+                                      * concerned either in the exact number
+                                      * of a subface, or in the cell that is
+                                      * behind it, not in both at the same
+                                      * time.
                                       */
     TriaIterator<dim,CellAccessor<dim> >
     neighbor_child_on_subface (const unsigned int face_no,