Clarify function of `serialEvent` on Arduino Due

[maltekliemann]

According to the docs for serialEvent:

serialEvent(), serialEvent1()``serialEvent2(), [sic] and serialEvent3() don't work on the Arduino Due.

This sentence needs clarification. What does "don't work" mean? Are they not implemented on the Arduino Due? Are they no-op? Does using them cause undefined behavior?

To give this question some context: I'm using serialEvent on a Arduino Due, and I'm only experiencing expected behavior. Now I'm worried I may be getting UB.

[per1234]

Hi @maltekliemann. Thanks for reporting this error. This information is incorrect. Arduino Due has support for all those. I submitted a pull request to correct this error:
#800
If you want to take a look at my proposed changes, I welcome any feedback.

[maltekliemann]

Hey @per1234, thank you very much! The PR obviously clarifies my issue.