Summary
- Tidying of some very old proofs
- merged
- tidying of some old proofs
- merged
- new contributor
- more List lemmas (partly by Jeremy Sylvestre)
- merged
- merged
- Trying to clean up some messy proofs
- Mostly, removing the unfold method
- Mostly trivial simplifications
- Removal of the "unfold" method in favour of "unfolding"
- Elimination of the archaic ASCII syntax
- strengthened lemmas preorder.reflp_ge[simp] and preorder.reflp_le[simp]
- added lemmas linorder.totalp_ge[simp], linorder.totalp_greater[simp], linorder.totalp_le[simp], and linorder.totalp_less[simp]