RFR: JDK-8234971: Incorrect example in j.l.reflect.RecordComponent::toString

[Vicente Romero]

Please review this very simple change to an example shown in the API for 
j.l.r.RecordComponent::toString. There are tests checking the correct 
behavior, it was just the example that was incorrect. I double checked 
that there is no need for a CSR for this simple change,

Thanks,
Vicente

http://cr.openjdk.java.net/~vromero/8234971/webrev.00/
https://bugs.openjdk.java.net/browse/JDK-8234971