title: Simple linear arrangement in graphviz
body: <p>I want to generate simple linear arrangements like this:</p>
  
  <p><img src="https://i.stack.imgur.com/WEs20.png" alt="graph I&#39;d love to recreate with graphviz"></p>
  
  <p>I think I am making this way too hard. I tried just hard coding the positions, but it is a little more complicated because I want splined edges.</p>
  
  <p>I don't particularly care if the edges are above or below, but specifying that would be a nice feature.</p>