old_contents: from configure import configure_flask
  from bokeh.server.app import app
  from bokeh.server.configure import make_tornado_app, register_blueprint
  
  configure_flask(config_file='config.py')
  register_blueprint()
  tornado_app = make_tornado_app(flask_app=app)
  
  
new_contents: from configure import configure_flask
  from bokeh.server.app import app
  from bokeh.server.configure import make_tornado_app, register_blueprint
  
  configure_flask(config_file='config.py')
  register_blueprint()
  tornado_app = make_tornado_app(flask_app=app)
  
subject: Remove extra line