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Here is the output of the command ‘diff -u lao tzu’ (see Sample diff Input, for the complete contents of the two files):

     --- lao	2002-02-21 23:30:39.942229878 -0800
     +++ tzu	2002-02-21 23:30:50.442260588 -0800
     @@ -1,7 +1,6 @@
     -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.
     +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,
     @@ -9,3 +8,6 @@
      The two are the same,
      But after they are produced,
        they have different names.
     +They both may be called deep and profound.
     +Deeper and more profound,
     +The door of all subtleties!