docs: def seq_seqhash(seq, normalize=True):
      """returns 24-byte Truncated Digest sequence `seq`
  
      >>> seq_seqhash("")
      'z4PhNX7vuL3xVChQ1m2AB9Yg5AULVxXc'
  
      >>> seq_seqhash("ACGT")
      'aKF498dAxcJAqme6QYQ7EZ07-fiw8Kw2'
  
      >>> seq_seqhash("acgt")
      'aKF498dAxcJAqme6QYQ7EZ07-fiw8Kw2'
  
      >>> seq_seqhash("acgt", normalize=False)
      'eFwawHHdibaZBDcs9kW3gm31h1NNJcQe'
  
      """
  
      seq = normalize_sequence(seq) if normalize else seq
      return str(vmc_digest(seq, digest_size=24))