diff --git a/docs/src/reference/docbook/reference/shell.xml b/docs/src/reference/docbook/reference/shell.xml
index e85fc273..273c4378 100644
--- a/docs/src/reference/docbook/reference/shell.xml
+++ b/docs/src/reference/docbook/reference/shell.xml
@@ -28,7 +28,10 @@
following diagram
-
+
+
+
+
diff --git a/docs/src/reference/docbook/samples/simple-application.xml b/docs/src/reference/docbook/samples/simple-application.xml
index 1670656e..83533603 100644
--- a/docs/src/reference/docbook/samples/simple-application.xml
+++ b/docs/src/reference/docbook/samples/simple-application.xml
@@ -114,7 +114,10 @@ public class HelloWorldCommands implements CommandMarker {
Here is an example session showing the behavior.
-
+
+
+
+
@@ -123,7 +126,10 @@ public class HelloWorldCommands implements CommandMarker {
supports the use of an enumeration as command method arguments.
-
+
+
+
+