error observed Since upgrade to SonarQube 8, “Files should contain an empty newline at the end” not being picked up both for new files and existing files.
The only change that we did in for this rule recently is to change the key from S00113 to S113.
Even though we did our best to make this change invisible for users, I suspect something misbehaved there.
What was the version from which you upgraded?
Can you check that this rule is still enabled in your project?