message: [Documentation] Improve help for mintzerocoin rpc command
diff: @@ -2483,9 +2483,9 @@ UniValue mintzerocoin(const UniValue& params, bool fHelp)
  {
  if (fHelp || params.size() < 1 || params.size() > 2)
  throw runtime_error(
  - "mintzerocoin <amount> [UTXOs]\n"
  - "amount: Enter an amount of Piv to convert to zPiv\n"
  - "UTXOs: (string, optional) A json array of objects. Each object the txid (string) vout (numeric)\n"
  + "mintzerocoin amount ( UTXOs )\n"
  + "amount: (numeric, required) Enter an amount of Piv to convert to zPiv\n"
  + "UTXOs: (string, optional) A json array of objects. Each object needs the txid (string) and vout (numeric)\n"
  " [ (json array of json objects)\n"
  " {\n"
  " \"txid\":\"id\", (string) The transaction id\n"
  @@ -2493,6 +2493,13 @@ UniValue mintzerocoin(const UniValue& params, bool fHelp)
  " }\n"
  " ,...\n"
  " ]\n"
  + "\nExamples:\n"
  + "\nMint 50 from anywhere\n" +
  + HelpExampleCli("mintzerocoin", "50") +
  + "\nMint 13 from a specific output\n" +
  + HelpExampleCli("mintzerocoin", "13 \"[{\\\"txid\\\":\\\"a08e6907dbbd3d809776dbfc5d82e371b764ed838b5655e72f463568df1aadf0\\\",\\\"vout\\\":1}]\"") +
  + "\nAs a json rpc call\n" +
  + HelpExampleRpc("mintzerocoin", "13, \"[{\\\"txid\\\":\\\"a08e6907dbbd3d809776dbfc5d82e371b764ed838b5655e72f463568df1aadf0\\\",\\\"vout\\\":1}]\"")
  + HelpRequiringPassphrase());
  LOCK2(cs_main, pwalletMain->cs_wallet);
  