mbtlinux:/sap/downloads # diff -v
diff (GNU diffutils) 3.8
Copyright (C) 2021 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <https://gnu.org/licenses/gpl.html>.
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.

Written by Paul Eggert, Mike Haertel, David Hayes,
Richard Stallman, and Len Tower.
mbtlinux:/sap/downloads # diff original.txt after_change.txt
6a7
>     METHODS test_3.
16a18,26
>     IF 1 = 2.
>       BREAK-POINT.
>     ENDIF.
>   ENDMETHOD.
>
>
>
>   METHOD test_3.
>     "method 3
mbtlinux:/sap/downloads # diff3 original.txt original.txt after_change.txt
====3
1:6a
2:6a
3:7c
      METHODS test_3.
====3
1:21a
2:21a
3:23,31c


    METHOD test_3.
      "method 3
      IF 1 = 2.
        BREAK-POINT.
      ENDIF.
    ENDMETHOD.

mbtlinux:/sap/downloads #