ProofSeq.unpack_append: law of lawful-bytes@0.1.1.0
Import: import lawful-bytes@0.1.1.0/proof_seq.bend as ProofSeq
Lines 144-147 of lawful-bytes@0.1.1.0/proof_seq.bend: https://jend.leeeet.dev/read.txt?path=lawful-bytes@0.1.1.0/proof_seq.bend&start_line=144&end_line=147

import Base
import lawful-bytes@0.1.1.0/defs.bend as D

law unpack_append:
  for +xs: List<&2, U32>
  for +ys: List<&2, U32>
  {D.unpack(List.append(&2, U32, xs, ys)) == List.append(&2, U32, D.unpack(xs), D.unpack(ys)) : List<&2, U32>}

Uses (5):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=List
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=List.append
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32
  https://jend.leeeet.dev/definition.txt?path=lawful-bytes@0.1.1.0/defs.bend&name=unpack
  https://jend.leeeet.dev/definition.txt?path=lawful-words@0.1.0.0/defs.bend&name=byte