title: Align Ranks in Graphviz
body: <p>This is a follow-up question to <a href="https://stackoverflow.com/questions/47396374/how-can-i-achieve-strict-reverse-ranking-of-graphviz-dot">How can I achieve strict reverse ranking of graphviz dot?</a>, but a little easier. This graph is contrived, but demonstrates the problem:</p>
  
  <pre><code>digraph nfa {
      A -&gt; B
      B -&gt; C
      C -&gt; D
      D -&gt; E
      A -&gt; F
      F -&gt; E
  }
  </code></pre>
  
  <p>Nodes B and F are the same rank, but they are not displayed at the same rank. How can achieve this?</p>
  
  <p><img src="https://i.stack.imgur.com/dS1zW.png" alt="enter image description here"></p>