traceroute: fix --help text

function                                             old     new   delta
traceroute_init                                     1151    1153      +2
packed_usage                                       33568   33570      +2
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(add/remove: 0/0 grow/shrink: 2/0 up/down: 4/0)                 Total: 4 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
1 file changed