From sort(1): -u, --unique with -c: check for strict ordering otherwise: out- put only the first of an equal run It took me a couple of attempts to parse it.
Created attachment 44837 [details] This makes it easier to read.
Agreed, fixed in 2.0.21-1 using a different patch (looks better IMO): --- textutils-2.0.21/man/sort.1.foo Tue Feb 26 13:25:28 2002 +++ textutils-2.0.21/man/sort.1 Tue Feb 26 13:30:56 2002 @@ -65,6 +65,7 @@ .TP \fB\-u\fR, \fB\-\-unique\fR with \fB\-c\fR: check for strict ordering +.br otherwise: output only the first of an equal run .TP \fB\-z\fR, \fB\-\-zero\-terminated\fR