Clarify something about software design.

git-svn-id: https://svn.dealii.org/trunk@5732 0785d39b-7218-0410-832d-ea1e28bc413d

diff --git a/deal.II/doc/tutorial/chapter-2.step-by-step/step-13.data/intro.html b/deal.II/doc/tutorial/chapter-2.step-by-step/step-13.data/intro.html
index 0aba96ec67b6b8ed1cb4338daedef857385eb93b..cd167e2b26748411c5a5407e1a83ca7a4de1943d 100644 (file)
--- a/deal.II/doc/tutorial/chapter-2.step-by-step/step-13.data/intro.html
+++ b/deal.II/doc/tutorial/chapter-2.step-by-step/step-13.data/intro.html
@@ -112,7 +112,17 @@ number of differences compared to previous example programs:
 The things the program does are not new. In fact, this is more like a
 melange of previous programs, cannibalizing various parts and
 functions from earlier examples. It is the way they are arranged in
-this program that should be the focus of the reader.
+this program that should be the focus of the reader, i.e. the software
+design techniques used in the program to achieve the goal of
+implementing the desired mathematical method. However, we must
+stress that software design is in part also a subjective matter:
+different persons have different programming backgrounds and have
+different opinions about the ``right'' style of programming; this
+program therefore expresses only what the author considers useful
+practice, and is not necessarily a style that you have to adopt in
+order to write successful numerical software if you feel uncomfortable
+with the chosen ways. It should serve as a case study, however,
+inspiring the reader with ideas to the desired end.
 </p>
 
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