Minor documentation error on `ip_path` property of Traceroute result

[vgiotsas]

According to the documentation for Traceroute results the ip_path property returns "A list of dicts containing the IPs at each hop", but in reality it's a list of lists, for example:

[['192.168.3.1', '192.168.3.1', '192.168.3.1'], ['178.132.80.226', '178.132.80.226', '178.132.80.226'], ['178.132.82.206', '178.132.82.206', '178.132.82.206'], ['80.231.208.9', '80.231.208.9', '80.231.208.9'], ['80.231.208.37', '80.231.208.37', '80.231.208.37'], ['195.219.156.62', '195.219.156.62', '195.219.156.62'], ['195.219.194.6', '195.219.194.6', '195.219.194.6'], ['80.231.131.160', '80.231.131.160', '80.231.131.160'], ['80.231.131.114', '80.231.131.114', '80.231.131.114'], ['172.31.213.25', '172.31.213.25', '172.31.213.25'], ['121.241.90.58', '121.241.90.58', '121.241.90.58'], ['118.185.135.65', '118.185.135.65', '118.185.135.65'], ['36.255.158.1', '36.255.158.1', '36.255.158.1']]