diff3の出力とオプションでそれを変更する様子を示す例で使用する 三番目のサンプルファイルは，以下のようになります．最初の二つのファイルは， diffで使用したものと同じです(see Sample diff Input)．以下 は，taoという三番目のサンプルファイルです．
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