update generic blink example

Author: tfeldmann

examples/GenericBlink/GenericBlink.ino

@@ -2,7 +2,7 @@
 This example shows how to use a generic indicator.
 The `update()` method returns HIGH or LOW that you can use however you want.
 
-Of course this example would be easer with a `IndicatorPin` which handles the
+Of course this example would be easer with a `Indicator` which handles the
 digital output automatically.
 */
 #include <BaseIndicator.h>
@@ -17,5 +17,6 @@ void setup()
 
 void loop()
 {
-    digitalWrite(13, myIndicator.update());
+    bool isOn = myIndicator.update();
+    digitalWrite(13, isOn);
 }