Indent methods under private?

private.rb

class Blah

  private

    def method1
    end

    def method2
    end

end

# vs.

class Blah

  private

  def method1
  end

  def method2
  end

end

# vs.

class Blah

  def public_method
  end

private

  def method1
  end

  def method2
  end

end

Who does #2 work for? https://www.youtube.com/watch?v=nmJKY59NX8o

Indenting private section is good for huge classes where you can find some private method, trying to use it, and then realise that it is actually private. So I use #2 for small classes and #1 for huge classes with a lot of private methods.
#3 way seems very strange and meaningless.

I've always used 1 but at my current job they use 2 so I've switched to that for the sake of consistency. I don't feel strongly but prefer 1.

However, I really dislike 3 as it visually interrupts the scope of the class.