Clean up whitespace in array function example

chapters/arrays.tex

@@ -220,14 +220,14 @@ \section{Built-in Array Functions}\label{built-in-array-functions}
 Some examples of using the functions defined in the following
 \cref{array-dimension-and-size-functions} to \cref{matrix-and-vector-algebra-functions}:
 \begin{lstlisting}[language=modelica]
-Real x[4,1,6];
-size(x,1) = 4;
+Real x[4, 1, 6];
+size(x, 1) = 4;
 size(x); // vector with elements 4, 1, 6
-size(2*x+x ) = size(x);
+size(2 * x + x) = size(x);
 Real[3] v1 = fill(1.0, 3);
-Real[3,1] m = matrix(v1);
+Real[3, 1] m = matrix(v1);
 Real[3] v2 = vector(m);
-Boolean check[3,4] = fill(true, 3, 4);
+Boolean check[3, 4] = fill(true, 3, 4);
 \end{lstlisting}
 \end{nonnormative}