ListProofs.append_assoc: law of bend-collections@1.0.0.0
Import: import bend-collections@1.0.0.0/proofs/crypto/sha/list_proofs.bend as ListProofs
Lines 3-9 of bend-collections@1.0.0.0/proofs/crypto/sha/list_proofs.bend: https://jend.leeeet.dev/read.txt?path=bend-collections@1.0.0.0/proofs/crypto/sha/list_proofs.bend&start_line=3&end_line=9

import Base

law append_assoc:
  for -A: Data
  for xs: List<&2, A>
  for ys: List<&2, A>
  for zs: List<&2, A>
  {List.append(&2, A, List.append(&2, A, xs, ys), zs)
    == List.append(&2, A, xs, List.append(&2, A, ys, zs)) : List<&2, A>}

Uses (2):
  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