[FAB-16528] marbles private chaincode sync up

This CR is part 2 of porting changes in marbles
private in fabric/integration by FAB-15894 back
to fabric-samples

Signed-off-by: Dongming <dongming@ibm.com>
Change-Id: Ic823bdf4c3c571f43b4700452c50fd4283d35262

chaincode/marbles02_private/go/marbles_chaincode_private.go

@@ -523,18 +523,16 @@ func (t *SimpleChaincode) getMarblesByRange(stub shim.ChaincodeStubInterface, ar
  return shim.Error(err.Error())
  }
  // Add a comma before array members, suppress it for the first array member
- if bArrayMemberAlreadyWritten == true {
+ if bArrayMemberAlreadyWritten {
  buffer.WriteString(",")
  }
- buffer.WriteString("{\"Key\":")
- buffer.WriteString("\"")
- buffer.WriteString(queryResponse.Key)
- buffer.WriteString("\"")
 
- buffer.WriteString(", \"Record\":")
- // Record is a JSON object, so we write as-is
- buffer.WriteString(string(queryResponse.Value))
- buffer.WriteString("}")
+ buffer.WriteString(
+ fmt.Sprintf(
+ `{"Key":"%s", "Record":%s}`,
+ queryResponse.Key, queryResponse.Value,
+ ),
+ )
  bArrayMemberAlreadyWritten = true
  }
  buffer.WriteString("]")