* Proper output of proof terms within a proof context;
* Proper output of antiquotations for theory commands involving a proof context;
* 'print_theorems': in theory mode print difference of facts, in proof mode print local facts;
use_thy "FP0";
use_thy "FP1";
use_thy "RECDEF";
use_thy "Rules";
use_thy "Sets";
use_thy "Ind";