\begin{longtable}{|X l|}
% KILLED & LINE!!!! \kill
\hline
\endfirsthead
\endhead
\endfoot
\hline
\endlastfoot

\multicolumn{2}{|X|}{\texttt{case }\textsl{Wert}\texttt{ in}} \\
\multicolumn{2}{|X|}{\texttt{~}\textsl{Muster1}\texttt{) }\textsl{Befehle1}\texttt{;;}} \\
\multicolumn{2}{|X|}{\texttt{~}\textsl{Muster2}\texttt{) }\textsl{Befehle2}\texttt{;;}} \\
\multicolumn{2}{|X|}{\texttt{~\vdots}} \\
\multicolumn{2}{|X|}{\texttt{esac}} \\
\end{longtable}