I don't really get this "joke" but man do I hate the trend of removing any personality from code. Programming used to be FUN and a way to express yourself. Easter eggs exemplified this. Now its cold and business only.
Back then manuals were also far more important, you couldn't operate the machine at all without one. Yet the jokes never managed to stop people from getting the information they needed.
I think the real difference when it comes to manuals is most modern ones are not comprehensive. I could see being upset if there was a joke but no information on my actual problem.