When force pushing/rebasing on an open PR, the bots will complain:
"Please do not rebase or force-push to an active PR as it invalidates existing review comments. All changes will be squashed into a single commit automatically when integrating. See OpenJDK Developers’ Guide for more information."

This can be misunderstood. A better wording for the second sentence would be:
"Note for future reference, the bots always squash all changes into a single commit automatically as part of the integration."