Add String synopsis case for Integer with 'format'

chapters/operatorsandexpressions.tex

@@ -495,6 +495,7 @@ \subsection{Numeric Functions and Conversion Functions}\label{numeric-functions-
 \begin{synopsis}\begin{lstlisting}
 String($b$, $\langle$$\mbox{\emph{options}}$$\rangle$)
 String($i$, $\langle$$\mbox{\emph{options}}$$\rangle$)
+String($i$, format = $s$)
 String($r$, $\langle$$\mbox{\emph{options}}$$\rangle$)
 String($r$, format = $s$)
 String($e$, $\langle$$\mbox{\emph{options}}$$\rangle$)