diffutils: Saving the Changed File

 
 8.5 Saving the Changed File
 ===========================
 
 Traditional Unix 'diff3' generates an 'ed' script without the trailing
 'w' and 'q' commands that save the changes.  System V 'diff3' generates
 these extra commands.  GNU 'diff3' normally behaves like traditional
 Unix 'diff3', but with the '-i' option it behaves like System V 'diff3'
 and appends the 'w' and 'q' commands.
 
    The '-i' option requires one of the 'ed' script options '-AeExX3',
 and is incompatible with the merged output option '-m'.