04724a1db2
Problem: In multisig.mligo, else clause on line 36 ends on line 55, while it should end on line 80. This happens because of incorrect lambda parsing on lines 42-43. In particular, `let valid, keys = vk` in lambda body gets parsed as a `tuple (fun_app "let" "valid") (binary_op "=" "keys" "vk")`, and `in` is considered as a part of the outer `let`. Solution: Allow `_program` instead of `_expr` as the lambda body.