Remove new text and add heading to examples as suggested.

Also change comment indentation.

chapters/inheritance.tex

@@ -547,6 +547,7 @@ \subsection{Final Element Modification Prevention}\label{final-element-modificat
 \end{nonnormative}
 
 \begin{example}
+Final component modification.
 \begin{lstlisting}[language=modelica]
 type Angle =
   Real(final quantity = "Angle", final unit = "rad", displayUnit = "deg");
@@ -569,26 +570,25 @@ \subsection{Final Element Modification Prevention}\label{final-element-modificat
 end Test;
 \end{lstlisting}
 \end{example}
-Declaring a class final makes all of its elements final, and makes the class non-replaceable.
-This definition applies recursively to the elements of the class that are also classes.
-It follows that a final class can only be used without modification.
+
 \begin{example}
+Final class declaration.
 \begin{lstlisting}[language=modelica]
 model Test2
   final model MyTF = TransferFunction(b = {1, 2});
   /* Equivalently:
   final model MyTF = TransferFunction(final a, final b = {1, 2});
   */
-  MyTF tf1;                            // fine
-  MyTF tf2(a = {1, 2});                // error, all elements in MyTF are final
-  model M = MyTF(a = {4});             // error, all elements in MyTF are final
+  MyTF tf1;                        // fine
+  MyTF tf2(a = {1, 2});            // error, all elements in MyTF are final
+  model M = MyTF(a = {4});         // error, all elements in MyTF are final
   model TFX
-    extends MyTF;                      // fine
+    extends MyTF;                  // fine
     Real foo = 1.0;
   end TFX;
-  TFX tfx(foo = 2.0);                  // fine, foo is not from MyRF
-  TFX tfx2(a = {1, 3});                // error, all elements from MyTF are final
-  model TFX3 = TFX(a = {1, 4});        // error, all elements from MyTF are final
+  TFX tfx(foo = 2.0);              // fine, foo is not from MyRF
+  TFX tfx2(a = {1, 3});            // error, all elements from MyTF are final
+  model TFX3 = TFX(a = {1, 4});    // error, all elements from MyTF are final
 end Test2;
 \end{lstlisting}
 \end{example}