message: rpc: Properly document gettxout return value
  Can be reviewed with --ignore-all-space
diff: @@ -1039,14 +1039,13 @@ static RPCHelpMan gettxout()
  {"n", RPCArg::Type::NUM, RPCArg::Optional::NO, "vout number"},
  {"include_mempool", RPCArg::Type::BOOL, /* default */ "true", "Whether to include the mempool. Note that an unspent output that is spent in the mempool won't appear."},
  },
  - RPCResult{
  - RPCResult::Type::OBJ, "", "",
  {
  + RPCResult{"If the UTXO was not found", RPCResult::Type::NONE, "", ""},
  + RPCResult{"Otherwise", RPCResult::Type::OBJ, "", "", {
  {RPCResult::Type::STR_HEX, "bestblock", "The hash of the block at the tip of the chain"},
  {RPCResult::Type::NUM, "confirmations", "The number of confirmations"},
  {RPCResult::Type::STR_AMOUNT, "value", "The transaction value in " + CURRENCY_UNIT},
  - {RPCResult::Type::OBJ, "scriptPubKey", "",
  - {
  + {RPCResult::Type::OBJ, "scriptPubKey", "", {
  {RPCResult::Type::STR_HEX, "asm", ""},
  {RPCResult::Type::STR_HEX, "hex", ""},
  {RPCResult::Type::NUM, "reqSigs", "Number of required signatures"},
  @@ -1056,6 +1055,7 @@ static RPCHelpMan gettxout()
  }},
  {RPCResult::Type::BOOL, "coinbase", "Coinbase or not"},
  }},
  + },
  RPCExamples{
  "\nGet unspent transactions\n"
  + HelpExampleCli("listunspent", "") +
  