class ActionDispatch::Journey::GTG::TransitionTable

def to_svg
  svg = IO.popen('dot -Tsvg', 'w+') { |f|
    f.write(to_dot)
    f.close_write
    f.readlines
  }
  3.times { svg.shift }
  svg.join.sub(/width="[^"]*"/, '').sub(/height="[^"]*"/, '')
end