================================================================================
filecontents environment
================================================================================
foo
\begin{filecontents}{wibble}
bar
\end{filecontents}
quux
--------------------------------------------------------------------------------
(document
  (text)
  (filecontents_env
    (begin
      (cs)
      (group (l) (name) (r))
      (group (l) (text) (r))
      (eol))
    (verbatim)
    (end (cs) (group (l) (name) (r))))
  (text))

================================================================================
filecontents* environment
================================================================================
foo
\begin{filecontents*}{wibble}
bar
\end{filecontents*}
quux
--------------------------------------------------------------------------------
(document
  (text)
  (filecontents_env
    (begin
      (cs)
      (group (l) (name) (r))
      (group (l) (text) (r))
      (eol))
    (verbatim)
    (end (cs) (group (l) (name) (r))))
  (text))