One more "short class definition" -> "short-class-definition"

Addressing comment by Hans:
- modelica#2916 (comment)

chapters/inheritance.tex

@@ -804,7 +804,7 @@ \subsection{Constraining Type}\label{constraining-type}
 \item
   The type of the declaration is also used as a constraining type.
 \item
-  The modifiers for subsequent redeclarations and constraining type are the modifiers on the component or short class definition if that is used in the original declaration, otherwise empty.
+  The modifiers for subsequent redeclarations and constraining type are the modifiers on the component or \lstinline[language=grammar]!short-class-definition! if that is used in the original declaration, otherwise empty.
 \end{itemize}
 
 The syntax of a constraining-clause\indexinline{constrainedby} is as follows: