This is pretty big PR that upstreams all of Std.Data.Int.Init in one go. So far lemmas have seen minimal changes needed to adapt to Lean core environment. --------- Co-authored-by: Scott Morrison <scott.morrison@gmail.com>
isDefEq
Issue was reported at https://leanprover.zulipchat.com/#narrow/stream/270676-lean4/topic/Change.20in.20pattern.20matching.3B.20expected.20behaviour.3F/near/259059096 fixes #742