IPv6: Add a missing comma and remove a colon in the output

[tcpdump] / tests / ip6_frag_asan.out

    1  2038-01-01 00:00:00.000000 IP6 (class 0x51, flowlabel 0xb2100, hlim 16, next-header Fragment (44), payload length 27136) 452:22:19:0:41a:e4ff:10ff:484d > 2243:80:1400:100:19:ffff:ffff:fffb: frag ( [|frag6]