diffutils: Saving the Changed File
8.5 Saving the Changed File
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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'.