[pstricks] A question about showexpl

[Rafael Villarroel]

I hope this is a good place to ask about the great showexpl package.

The following document compiles fine, but at the expense of the
\makeatother commmand,
which is not necessary for the example to work. It seems that commands
with @ on it
do not work well with the LTXexample environment. This is without loading
any showexpl.cfg. Is there any way for this to work, so that one does
not have to
include the \makeatother in the example?

Thanks in advance
Rafael

----------------------
\documentclass{article}

\usepackage[matrix,arrow]{xy}
\usepackage{showexpl}

\begin{document}

\lstset{%
    basicstyle=\ttfamily\small,
    showspaces=false,
    showstringspaces=false,
    breaklines=true,
    numberstyle=\ttfamily\tiny,
    breakautoindent=true,
}

\begin{LTXexample}[pos=r,wide,width=0.5]
  \documentclass{article}
  \usepackage[matrix,arrow]{xy}
  \begin{document}
  \begin{center}
    \makeatother
    \xymatrix{
      & Q(\sqrt 2,\sqrt{-3}) \ar@{-}[d]\ar@{-}[dr]\ar@{-}[dl] \\
      Q(\sqrt 2) \ar@{-}[dr] & Q(\sqrt{-6}) \ar@{-}[d] & B
      Q(\sqrt{-3}) \ar@{-}[dl] \\
      & Q &
    }
  \end{center}
  \end{document}
\end{LTXexample}
\end{document}