There is a chance that the title here was intentionally worded to answer a question people are likely to search for, then actually answer their concerns.
HN would never do that, it would violate the minimalism of the site.
Most people aren't even aware that their posted URLs can be changed or their titles re-edited automatically because the UI doesn't give affordances for anything. You're just expected to notice and edit it out within the edit window (which there also isn't an affordance for.)
