My editor is set to wrap around on long lines... but that is again of course another thing that potentially has to be tweaked. That is something that is done when writing normal text (like in this text box here on this website), and is done in word processors, so it feels pretty natural.

Though I've used that (wrapping around) mostly when writing in Haskell, for some reason. In Java and whatever lines tend to not become too long, perhaps because I tend to use four space indent...