old_contents: """
  Echidna demo server.
  """
  
  import os
  
  from cyclone.web import RequestHandler
  
  from echidna.server import EchidnaServer
  
  
  class DemoServer(EchidnaServer):
      """
      A server to demo Echidna.
      """
  
      def __init__(self, yaml_file=None, **settings):
          defaults = {
              "template_path": (
                  os.path.join(os.path.dirname(__file__), "templates")),
              "static_path": (
                  os.path.join(os.path.dirname(__file__), "static")),
              "static_url_prefix": "/static/",
              "autoescape": None,
          }
          defaults.update(settings)
          EchidnaServer.__init__(self, DemoPageHandler, yaml_file, **defaults)
  
  
  class DemoPageHandler(RequestHandler):
      """
      Render the demo page.
      """
  
      def get(self):
          self.render("demo.html",
                      api_server="localhost:8888",
                      channels=[
                          ("radio_ga_ga", "Radio Ga Ga"),
                          ("channel_x", "Channel X"),
                          ("major_tom", "Major Tom"),
                      ])
  
new_contents: """
  Echidna demo server.
  """
  
  import os
  
  from cyclone.web import RequestHandler
  
  from echidna.server import EchidnaServer
  
  
  class DemoServer(EchidnaServer):
      """
      A server to demo Echidna.
      """
  
      def __init__(self, yaml_file=None, **settings):
          defaults = {
              "template_path": (
                  os.path.join(os.path.dirname(__file__), "templates")),
              "static_path": (
                  os.path.join(os.path.dirname(__file__), "static")),
              "static_url_prefix": "/static/",
              "autoescape": None,
          }
          defaults.update(settings)
          EchidnaServer.__init__(self, DemoPageHandler, yaml_file, **defaults)
  
  
  class DemoPageHandler(RequestHandler):
      """
      Render the demo page.
      """
  
      def get(self):
          self.render("demo.html",
                      api_server="localhost:8888",
                      channels=[
                          ("Visual Radio", "visualradio"),
                          ("radio_ga_ga", "Radio Ga Ga"),
                          ("channel_x", "Channel X"),
                          ("major_tom", "Major Tom"),
                      ])
  
subject: Add real channel name