Fix a class name in step-69 commentary.

diff --git a/examples/step-69/step-69.cc b/examples/step-69/step-69.cc
index 04a1d4530fdf5542ab6ac40ae4f5a4914fa7913a..a76fc1b54a8c5c6334d8c4fce0835a154082ac2c 100644 (file)
--- a/examples/step-69/step-69.cc
+++ b/examples/step-69/step-69.cc
@@ -416,7 +416,7 @@ namespace Step69
 
   // @sect4{The <code>SchlierenPostprocessor</code> class}
   //
-  // At its core, the Schlieren class implements the class member
+  // At its core, the SchlierenPostprocessor class implements the class member
   // <code>compute_schlieren()</code>. The main purpose of this class member
   // is to compute an auxiliary finite element field
   // <code>schlieren</code>, that is defined at each node by