parse_visibility

# File lib/rdoc/parser/ruby.rb, line 1879
  def parse_visibility(container, single, tk)
    vis_type, vis, singleton = get_visibility_information tk, single

    skip_tkspace_comment false

    case peek_tk
      # Ryan Davis suggested the extension to ignore modifiers, because he
      # often writes
      #
      #   protected unless $TESTING
      #
    when TkNL, TkUNLESS_MOD, TkIF_MOD, TkSEMICOLON then
      container.ongoing_visibility = vis
    else
      update_visibility container, vis_type, vis, singleton
    end
  end