diffutils: Invoking diff3

 
 14 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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