[O] LaTeX export: Theorem with an author

[Vincent Beffara]

Hi, 

How to generate latex code for a theorem with an author, like this:

\begin{theorem}[Newton]
Blah.
\end{theorem}

With the old exporter, you could do this:

#+BEGIN_theorem Newton
Blah.
#+END_theorem

(possibly with brackets, not sure) but now the rest of the #+BEGIN_ line is 
ignored ... This works:

#+BEGIN_theorem
[Newton]
Blah.
#+END_theorem

but it is more by accident than anything else. What would be the right way?

Thanks,

/v 

-- 
Vincent Beffara