When comments end in a period, start sentence with upper case

chapters/operatorsandexpressions.tex

@@ -1387,23 +1387,23 @@ \section{Variability of Expressions}\label{variability-of-expressions}
 \begin{lstlisting}[language=modelica]
 model Constants
   parameter Real p1 = 1;
-  constant Real c1 = p1 + 2; // error, not a constant expression
-  parameter Real p2 = p1 + 2; // fine
+  constant Real c1 = p1 + 2; // Error, not a constant expression.
+  parameter Real p2 = p1 + 2; // Fine.
 end Constants;
 model Test
-  Constants c1(p1=3); // fine
-  Constants c2(p2=7); // fine, declaration equation can be modified
+  Constants c1(p1 = 3); // Fine.
+  Constants c2(p2 = 7); // Fine, declaration equation can be modified.
   Real x;
-  Boolean b1 = noEvent(x > 1); // error, since b1 is a discrete-time variable
+  Boolean b1 = noEvent(x > 1); // Error, since b1 is a discrete-time variable
                                // and noEvent(x > 1) is not discrete-time.
   Boolean b2;
   Integer i1;
   Integer i2;
 algorithm
-  i1 := x; // error, assignment to variable of lesser variability.
+  i1 := x; // Error, assignment to variable of lesser variability.
 equation
-  b2 = noEvent(x > 1); // no variability error, but equation cannot be matched.
-  i2 = x;              // no variability error, and can be matched to x.
+  b2 = noEvent(x > 1); // No variability error, but equation cannot be matched.
+  i2 = x;              // No variability error, and can be matched to x.
 end Test;
 \end{lstlisting}
 \end{example}