Invoking diff3

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Invoking `diff3'
****************

   The `diff3' command compares three files and outputs descriptions of
their differences.  Its arguments are as follows:

     diff3 OPTIONS... MINE OLDER YOURS

   The files to compare are MINE, OLDER, and YOURS.  At most one of
these three file names may be `-', which tells `diff3' to read the
standard input for that file.

   An exit status of 0 means `diff3' was successful, 1 means some
conflicts were found, and 2 means trouble.

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