\begin{code}
module Main where
main = print str
\end{code}

\end{code}sdfhjk
> str = "string"

-- good for testing with some compilers the effect of the
-- technical term "UNLIT_IGNORED" that I invented,
-- since all compilers I tested with choose UNLIT_IGNORED
-- behavior for \end{code}sdfhjk, and thus there is an unlit
-- error due to comment line adjacent to program line