The documentation for sort says.
The sort algorithms used by @cmd{SORT CASES} are stable. That is,
records that have equal values of the sort variables will have the
same relative order before and after sorting. As a special case,
re-sorting an already sorted file will not affect the ordering of
cases.The last sentence confuses me. Why is it a special case? Isn't that property necessary for a stable sort? -- PGP Public key ID: 1024D/2DE827B3 fingerprint = 8797 A26D 0854 2EAB 0285 A290 8A67 719C 2DE8 27B3 See http://pgp.mit.edu or any PGP keyserver for public key.
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