What does # route mean in rails?

Question

Ruby on Rails

gem traceroute returns # the route in unused routes.
I can’t understand how exactly it is described in the routes.rb
example:

→ bundle exec rake traceroute
2015-08-24T13:31:30.423+03:00 rake/traceroute sL5XaTPd INFO - Invoked with args: []
Unused routes (3):
  #
  #
  #
Unreachable action methods (0):

Answer 1

found the answer on github

Answer 2

# - in routes (and not only), used to separate the controller and action. If I understand the question correctly.