tests/data/nlenv.out

   1 x
   2 \begin{y}
   3 ?
   4 \end{y}
   5 z x
   6 \begin{y}
   7 ?
   8 \end{y}
   9 z x \begin{y}?\end{y} z x
  10 \begin{y}?\end{y} z
  11         x \begin{y}
  12 ?\end{y} z
  13         x \begin{y}?
  14 \end{y} z
  15         x \begin{y}?\end{y}
  16 z
  17 \begin{foo}[options1]{parameters1}[options2]{parameters2}[options3]{parameters3}[options4]
  18 text...
  19 \end{foo}