    # File lib/spec/runner/formatter/nested_text_formatter.rb, line 13
            def add_example_group(example_group)
              super

              current_nested_example_groups = described_example_group_chain
              current_nested_example_groups.each_with_index do |nested_example_group, i|
                unless nested_example_group == previous_nested_example_groups[i]
                  output.puts "#{'  ' * i}#{nested_example_group.description_args}"
                end
              end

              @previous_nested_example_groups = described_example_group_chain
            end