fix mandoc warnings

- sort references in SEE ALSO section to section number, name.
- cols.1: proper order of sections.
- wrap lines to max 79 column length.

tr.1

@@ -71,8 +71,8 @@ Input processed successfully.
 An error occurred.
 .El
 .Sh SEE ALSO
-.Xr sed 1 ,
 .Xr awk 1 ,
+.Xr sed 1 ,
 .Xr utf8 7
 .Sh STANDARDS
 The