This is for teaching code.<p>I <i>want</i> people to see my code, but I want to remove as many of the conveniences that enable them to just copy-paste that I can -- while not severely hindering my own ability to write and maintain lessons (once code is in PNG...it&#x27;s quite difficult to grep and&#x2F;or re-edit), because I believe having to just physically type out code slows you enough that you actually <i>think</i> about the code.<p>Also, having to type out code pretty much forces you to get into the habit of using keyboard shortcuts, particularly auto-complete.