I can't see where these two lines are printed.
Index: route.8 =================================================================== RCS file: /cvs/src/sbin/route/route.8,v retrieving revision 1.91 diff -u -p -r1.91 route.8 --- route.8 19 Jan 2020 18:22:31 -0000 1.91 +++ route.8 10 Sep 2020 20:06:52 -0000 @@ -197,8 +197,6 @@ If the priority is negative, then routes priority are shown. .El .Pp -.Tg destination -.Tg gateway The other commands relating to adding, changing, or deleting routes have the syntax: .Pp