add # -no-c-format to example

Co-authored-by: Henrik Tidefelt <henrikt@wolfram.com>

chapters/packages.tex

@@ -363,6 +363,7 @@ \section{Multilingual Descriptions}\label{multilingual-descriptions}
 For Modelica translations, only the keywords \lstinline!msgctxt!, \lstinline!msgid! and \lstinline!msgstr! are used, meaning that a translation entry looks like this:
 \begin{lstlisting}
 #: $\mathit{filename}$:$\mathit{lineNumber}$
+# no-c-format
 msgctxt $\mathit{messageContext}$
 msgid $\mathit{messageIdentifier}$
 msgstr $\mathit{messageTranslation}$