List.append_assoc: law of bend-lawful-stdlib@0.1.0.0
Import: import bend-lawful-stdlib@0.1.0.0/src/list.bend as List
Lines 36-41 of bend-lawful-stdlib@0.1.0.0/src/list.bend: https://jend.leeeet.dev/read.txt?path=bend-lawful-stdlib@0.1.0.0/src/list.bend&start_line=36&end_line=41

import Base

law append_assoc:
  for -A: Data
  for a: List<&2, A>
  for -b: List<&2, A>
  for -c: List<&2, A>
  {List.append(&2, A, a, List.append(&2, A, b, c)) == List.append(&2, A, List.append(&2, A, a, b), c) : 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