From: Wolfgang Bangerth <bangerth@colostate.edu>
Date: Wed, 22 Jan 2020 23:51:37 +0000 (-0700)
Subject: Mention namespaces in step-20.
X-Git-Tag: v9.2.0-rc1~622^2
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=refs%2Fpull%2F9416%2Fhead;p=dealii.git

Mention namespaces in step-20.
---

diff --git a/examples/step-20/step-20.cc b/examples/step-20/step-20.cc
index c1713c06e7..98d412490b 100644
--- a/examples/step-20/step-20.cc
+++ b/examples/step-20/step-20.cc
@@ -64,7 +64,8 @@
 // <code>TensorFunction</code> class that offers such functionality:
 #include <deal.II/base/tensor_function.h>
 
-// The last step is as in all previous programs:
+// The last step is as in all previous programs: We put all of the code relevant
+// to this program into a namespace. (This idea was first introduced in step-7.)
 namespace Step20
 {
   using namespace dealii;