Descriptions of each route sub-command's arguments are enclosed in
.RS/.RE pairs. For 'replace' sub-command, '.RE' was incorrectly put
before the last argument ('expires').
Fixes: 3fbe7ca847367 ("iproute2: ip-route.8.in: Add expires option for ip route") Signed-off-by: Phil Sutter <phil@nwl.cc>