Add exception for encapsulated short class lookup, and example demons…

…trating it.

Closes modelica#2743

chapters/classes.tex

@@ -601,6 +601,8 @@ \subsection{Short Class Definitions}\label{short-class-definitions}
 end IDENT1;
 \end{lstlisting}
 
+An exception to the above is that if the short class definition is declared as \lstineline!encapsulated!, then the modifiers cannot be looked up in the enclosing scope.
+
 \begin{example}
 Demonstrating the difference in scopes:
 \begin{lstlisting}[language=modelica]
@@ -617,6 +619,8 @@ \subsection{Short Class Definitions}\label{short-class-definitions}
     // Gives the singular equation R=R, since the right-hand side R
     // is searched for in LoadError and found in its base-class Resistor.
   end LoadError constrainedby TwoPin;
+  encapsulated model Load2=.Resistor(R=2); // Ok
+  encapsulated model LoadR=.Resistor(R=R); // Illegal
   Load a,b,c;
   ConstantSource ...;
   ...