[developers] Export generated trees

[Berthold Crysmann]

Ann Copestake wrote:

>if you call (show-gen-result-tty) after a structure is generated in the LKB you
>get a bracketed output of the labelled tree in the emacs buffer.  The function
>is in mrs/mrstoplevel.lisp if you want to make your own variant.
>
>
>  
>
Thanks, Ann.

Do you or does anybody else know  whether and how it is possible to 
record the results of generation in  [incr tsdb()].  Currently,  I get 
only the usual statistics, but no  generated strings, derivations, or 
trees. 

Berthold