Understand where PICO should report error

[aosen-xiong]

Currenly, PICO issue error at wrong location after spotless format.

[wmdietl]

Can you add an illustrative example? How does the code look before/after formatting?

[aosen-xiong]

Maybe let's solve other problems first? Because spotless right now is not enabled in this project. I can not accurately recall what are the code examples. Just put a reminder here first.