message: Fix nits in regtest btg-timelock.py.
diff: @@ -48,7 +48,7 @@ class BTGTimeLockTest(BitcoinTestFramework):
  pubkeys = []
  for i in range(6):
  raw_key = CECKey()
  - raw_key.set_secretbytes(b'privkey%d' % i)
  + raw_key.set_secretbytes(('privkey%d' % i).encode('ascii'))
  rawkeys.append(raw_key)
  pubkeys = [CPubKey(key.get_pubkey()) for key in rawkeys]
  