Yay diversity! FYI, though, I think this ad is contrary to EEOC rules. My understanding is that its okay to encourage diversity in applicants, but not to state a hiring priority based on race, sex, age, etc.
Since the original commenter edited his post to address your observation, it seems like a good idea to detach this (helpful) comment from https://news.ycombinator.com/item?id=14241007 and mark it off-topic.
https://www.eeoc.gov/laws/practices/#job_advertisements