AT_CAPTURE_FILE([sort-cases.sps])
AT_DATA([sort-cases.sps], [dnl
DATA LIST LIST NOTABLE FILE='data.txt'/x y (F8).
-SORT BY x[]m4_if([$3], [], [], [/BUFFERS=$3]).
+SORT CASES BY x[]m4_if([$3], [], [], [/BUFFERS=$3]).
PRINT OUTFILE='output.txt'/x y.
EXECUTE.
])