message: [tests] Correct docstring for address.py
diff: # Copyright (c) 2016-2020 The Bitcoin Core developers
  # Distributed under the MIT software license, see the accompanying
  # file COPYING or http://www.opensource.org/licenses/mit-license.php.
  -"""Encode and decode BASE58, P2PKH and P2SH addresses."""
  +"""Encode and decode Bitcoin addresses.
  +
  +- base58 P2PKH and P2SH addresses.
  +- bech32 segwit v0 P2WPKH and P2WSH addresses."""
  import enum
  import unittest
  