File psl-1983/3-1/tests/mini-loop-macros.red from the latest check-in
% MINI-LOOP-MACROS.RED fexpr procedure While fl; Begin if not PairP fl then return 'NIL; While Eval Car fl do EvProgn cdr fl; End; End;
% MINI-LOOP-MACROS.RED fexpr procedure While fl; Begin if not PairP fl then return 'NIL; While Eval Car fl do EvProgn cdr fl; End; End;