law jt
import lawful-fields@0.1.1.0/proof_list.bend as ProofListimport Base
import lawful-fields@0.1.1.0/defs.bend as F
229law jt:
230 for +t: List<&2, List<&2, U32>>
231 for +p: List<&2, U32>
232 for +sep: U32
233 {F.text(List.append(&2, U32, p, F.join.go(t, sep))) == String.join.go(F.texts(t), F.text(p), F.text([sep])) : String}