Add space around '=' in code

chapters/classes.tex

@@ -278,7 +278,8 @@ \subsubsection{Prefix Rules}\label{prefix-rules}
 
 \subsection{Acyclic Bindings of Constants and Parameters}\label{acyclic-bindings-of-constants-and-parameters}
 
-The unexpanded binding equations for parameters and constants in the translated model must be acyclic after flattening; except that cycles are allowed if the cycles disappear when evaluating parameters having annotation \lstinline!Evaluate=true! that are not part of the cycle. Thus it is not possible to introduce equations for parameters by cyclic dependencies.
+The unexpanded binding equations for parameters and constants in the translated model must be acyclic after flattening; except that cycles are allowed if the cycles disappear when evaluating parameters having annotation \lstinline!Evaluate = true! that are not part of the cycle.
+Thus it is not possible to introduce equations for parameters by cyclic dependencies.
 
 \begin{example}
 \begin{lstlisting}[language=modelica]
@@ -302,7 +303,7 @@ \subsection{Acyclic Bindings of Constants and Parameters}\label{acyclic-bindings
 
 partial model PartialLumpedVolume
   parameter Boolean use_T_start = true "= true, use T_start, otherwise h_start"
-    annotation(Dialog(tab = "Initialization"), Evaluate=true);
+    annotation(Dialog(tab = "Initialization"), Evaluate = true);
   parameter Medium.Temperature T_start=if use_T_start then system.T_start else
       Medium.temperature_phX(p_start,h_start,X_start)
     annotation(Dialog(tab = "Initialization", enable = use_T_start));