I see it done again at least once a week. Is it just because the movie is popular among programmers, or is there something more to it?
Many of us have a fondness for comparatively old-fashioned approaches to various things; double titles like that are one such example, using em dashes despite space-separated en dashes being more popular is another (though that one varies by locale), and writing “&c.” for “et cetera” is another (there’s lots of fun history around the ampersand ligature).
But actually it goes back even further, at least to the 17th century, https://en.wikipedia.org/wiki/Twelfth_Night#/media/File:Twel...
Okay so I was told in my English writing class that in US English one uses the longer em dashes without spaces. But I just can't get over how they look, and in German we use en dashes with spaces (AFAIK), so I usually do that when writing English except if it is a paper where my advisor will complain if I do. ;)