Reformulate to have a non-normative introduction, followed by an actu…

…al normative part.

chapters/overloaded.tex

@@ -1,18 +1,19 @@
 \chapter{Overloaded Operators}\label{overloaded-operators}
 
-A Modelica \lstinline!operator record! can define the behavior for
-operations such as constructing, adding, multiplying etc. This is done
-using the specialized class \lstinline!operator! (a restricted class
-similar to \lstinline!package!, see \cref{specialized-classes}) comprised of functions
-implementing different variants of the operation for the record class in
-which the respective \lstinline!operator! definition resides.
+A Modelica \lstinline!operator record! can overload the behavior for
+operations such as constructing, adding, multiplying etc.
 
-\begin{nonnormative}
-The overloading is defined in such a way that ambiguities are not allowed and give an error.  Furthermore, it is sufficient to define overloading for scalars.
+The overloading is defined in such a way that ambiguities are not allowed and give an error.
+Furthermore, it is sufficient to define overloading for scalars.
 Overloaded array operations are automatically deduced from the overloaded scalar operations.
-\end{nonnormative}
 
-The \lstinline!operator! keyword is followed by the name of the operation:
+\section{Overview of overloaded operators}\label{overview-of-overloaded-operators}
+In an \lstinline!operator record! the definition of operations are done using the specialized class \lstinline!operator!
+(a restricted class similar to \lstinline!package!, see \cref{specialized-classes})
+followed by the name of the operation. Each \lstinline!operator! class is
+comprised of functions
+implementing different variants of the operation for the \lstinline!operator record! class in
+which the definition resides.
 % This was something weird that could be seen as a table originally,
 % that is somewhat awkward - but keeping it.
 %