Comment by tikhonj

This is a great example where humor can help: I love http.cat because the whimsy makes it easier to look up and remember status codes. Not exactly the same as jokes in code, but an example of how more humor can be better than less humor for practical, human-factors reasons.

https://http.cat/451 and https://http.cat/510 for reference

451 is a bit of a niche joke (took me a bit to realize it was Ray Bradbury), but 510 is definitely going to help me remember "not extended" :P