ZF/ind-syntax/refl_thin: new
ZF/intr-elim: added Pair_neq_0, succ_neq_0, refl_thin to simplify case rules
ZF/sum/Inl_iff, etc.: tidied and proved using simp_tac
ZF/qpair/QInl_iff, etc.: tidied and proved using simp_tac
ZF/datatype,intr_elim: replaced the undirectional use of sum_univ RS subsetD
by dresolve_tac InlD,InrD and etac PartE
#! /bin/csh
grep "$*" {Pure/Syntax,Pure/Thy}/*ML */*ML */ex/*ML