ruby super keyword

The example provided in the Ruby Docs for the super keyword:

module Vehicular
  def move_forward(n)
    @position += n
  end
end

class Vehicle
  include Vehicular  # Adds Vehicular to the lookup path
end

class Car < Vehicle
  def move_forward(n)
    puts "Vrooom!"
    super            # Calls Vehicular#move_forward
  end
end

Inspecting ancestors

puts Car.ancestors.inspect

# Output
# [Car, Vehicle, Vehicular, Object, Kernel, BasicObject]

Note the inclusion of the Vehicular Module object!