message: Fix typo in account_address
  Fixing a typo in account_address
diff: @@ -171,7 +171,7 @@ impl From<PublicKey> for AccountAddress {
  fn from(public_key: PublicKey) -> AccountAddress {
  // TODO: using keccak directly instead of crypto::hash because we have to make sure we use
  // the same hash function that the Move transaction prologue is using.
  - // TODO: keccak is just a placeholder, make a principled choose for the hash function
  + // TODO: keccak is just a placeholder, make a principled choice for the hash function
  let mut keccak = Keccak::new_sha3_256();
  let mut hash = [0u8; ADDRESS_LENGTH];
  keccak.update(&public_key.to_slice());
  