diffutils: Invoking sdiff

 
 16 Invoking 'sdiff'
 *******************
 
 The 'sdiff' command merges two files and interactively outputs the
 results.  Its arguments are as follows:
 
      sdiff -o OUTFILE OPTIONS... FROM-FILE TO-FILE
 
    This merges FROM-FILE with TO-FILE, with output to OUTFILE.  If
 FROM-FILE is a directory and TO-FILE is not, 'sdiff' compares the file
 in FROM-FILE whose file name is that of TO-FILE, and vice versa.
 FROM-FILE and TO-FILE may not both be directories.
 
    'sdiff' options begin with '-', so normally FROM-FILE and TO-FILE may
 not begin with '-'.  However, '--' as an argument by itself treats the
 remaining arguments as file names even if they begin with '-'.  You may
 not use '-' as an input file.
 
    'sdiff' without '--output' ('-o') produces a side-by-side difference.
 This usage is obsolete; use the '--side-by-side' ('-y') option of 'diff'
 instead.
 
    An exit status of 0 means no differences were found, 1 means some
 differences were found, and 2 means trouble.
 

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