     }
     Serial.print(F("Data in block ")); Serial.print(blockAddr); Serial.println(F(":"));
     dump_byte_array(buffer, 16); Serial.println();
-        
+
     // Check that data in block is what we have written
     // by counting the number of bytes that are equal
     Serial.println(F("Checking result..."));

    Serial.print(F("Using key (for A and B):"));
    dump_byte_array(key.keyByte, MFRC522::MF_KEY_SIZE);
    Serial.println();
    
    Serial.println(F("BEWARE: Data will be written to the PICC, in sector #1"));
}


        Serial.println(F("  perhaps the write didn't work properly..."));
    }
    Serial.println();

    // Dump the sector data
    Serial.println(F("Current data in sector:"));
    mfrc522.PICC_DumpMifareClassicSectorToSerial(&(mfrc522.uid), &key, sector);
