</a> <span class="arrow">&#45;&gt;</span></span>
  unit</span></code></div><div class="spec-doc"><p><code>dot_output name s</code> writes a .dot representation of <code>s</code> with name <code>name</code>. The name of the output file is <code>name.dot</code> or specified with the <code>fname</code> optional argument. States listed with the optional argument <code>marked_states</code> will be drawn with the specified style. Extra nodes, to be added to the generated graph, can be specified with the <code>ext