7.1 3つ目の入力例ファイル
diff3 の出力と、各種オプションで出力がどう変わるかを示すため、例に使う3つ目のサンプルファイルを挙げます。最初の2つは diff で使ったものと同じです（2つの入力例ファイル を参照）。これが3つ目のファイルで、tao という名前です。
The Way that can be told of is not the eternal Way; The name that can be named is not the eternal name. The Nameless is the origin of Heaven and Earth; The named is the mother of all things. Therefore let there always be non-being, so we may see their subtlety, And let there always be being, so we may see their result. The two are the same, But after they are produced, they have different names. -- The Way of Lao-Tzu, tr. Wing-tsit Chan