Address comment regarding "extends-clause" and "short-class-definition"

Addressed comment (by Hans):
- #2916 (comment)

chapters/annotations.tex

@@ -794,7 +794,7 @@ \subsection{Component Instance}\label{component-instance}
 
 \subsection{Extends clause}\label{extends-clause}
 
-Each extends-clause (and short class definition, as stated in \cref{annotations-for-graphical-objects}) may have layer specific annotations which describe the rendering of the base class' icon and diagram layers in the derived class.
+Each \lstinline[language=grammar]!extends-clause! (and \lstinline[language=grammar]!short-class-definition!, as stated in \cref{annotations-for-graphical-objects}) may have layer specific annotations which describe the rendering of the base class' icon and diagram layers in the derived class.
 
 \begin{lstlisting}[language=modelica]
 record IconMap