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Comparing and Merging Files with GNU diff and patch
by David MacKenzie, Paul Eggert, and Richard Stallman
Paperback (6"x9"), 120 pages
ISBN 0954161750
RRP £12.95 ($19.95)

"Well packaged... the quality of information is excellent" --- Linux User and Developer Magazine (Issue 36, Feb 2004) Get a printed copy>>>

2.4.2 An Example of Side by Side Format

Here is the output of the command ‘diff -y -W 65 lao tzu’ (see section 2.1 Two Sample Input Files, for the complete contents of the two files).

The Way that can be told of i <
The name that can be named is <
The Nameless is the origin of   The Nameless is the origin of
The Named is the mother of al | The named is the mother of al
                              >
Therefore let there always be   Therefore let there always be
  so we may see their subtlet     so we may see their subtlet
And let there always be being   And let there always be being
  so we may see their outcome     so we may see their outcome
The two are the same,           The two are the same,
But after they are produced,    But after they are produced,
  they have different names.      they have different names.
                              > They both may be called deep 
                              > Deeper and more profound,
                              > The door of all subtleties!
ISBN 0954161750Comparing and Merging Files with GNU diff and patchSee the print edition