docs: def dump(args):
      """Load the build graph for a target and dump it to stdout."""
      if len(args) != 1:
          log.error('One target required.')
          app.quit(1)
  
      try:
          bb = Butcher()
          bb.load_graph(args[0])
      except error.BrokenGraph as lolno:
          log.fatal(lolno)
          app.quit(1)
      print "Nodes:"
      pprint.pprint(bb.graph.node)
      print "Edges:"
      pprint.pprint(bb.graph.edge)