Remove :

Author: brentru

examples/adafruitio_secure_esp8266/adafruitio_secure_esp8266.ino

@@ -49,7 +49,7 @@ Adafruit_MQTT_Client mqtt(&client, AIO_SERVER, AIO_SERVERPORT, AIO_USERNAME, AIO
 *  to ESP32 which has certificate verification by storing root certs and having a
 *  chain-of-trust rather than doing individual certificate fingerprints.
 */
-static const char *fingerprint PROGMEM = "47:D2:CB:14:DF:38:97:59:C6:65:1A:1F:3E:00:1E:53:CC:A5:17:E0";
+static const char *fingerprint PROGMEM = "47 D2 CB 14 DF 38 97 59 C6 65 1A 1F 3E 00 1E 53 CC A5 17 E0";
 
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