The man page came as part of a package. Find which package it belongs to. Follow that back upstream to your distribution, they will probably have a link to the upstream repository or developers. Go there, submit a patch, or update following the procedures defined for that project.
So on my Debian system I mind use the following commands to figure out the upstream developer.
zoredache@host$ dpkg -S traceroute traceroute: /usr/share/doc/traceroute/copyright traceroute: /usr/share/doc/traceroute/CREDITS traceroute: /usr/bin/traceroute.db nmap: /usr/share/nmap/scripts/targets-traceroute.nse traceroute: /usr/share/man/man1/traceroute6.db.1.gz traceroute: /usr/share/man/man8/tcptraceroute.db.8.gz traceroute: /usr/share/doc/traceroute traceroute: /usr/share/doc/traceroute/README traceroute: /usr/bin/traceroute-nanog traceroute: /usr/sbin/tcptraceroute.db traceroute: /usr/bin/traceroute6.db traceroute: /usr/share/doc/traceroute/changelog.gz traceroute: /usr/share/doc/traceroute/changelog.Debian.gz traceroute: /usr/share/man/man1/traceroute.db.1.gz traceroute: /usr/share/man/man1/traceroute-nanog.1.gz traceroute: /usr/share/doc/traceroute/TODO zoredache@host$ apt-cache show traceroute Package: traceroute Version: 1:2.0.18-3 Installed-Size: 175 Maintainer: Daniel Baumann <daniel.baumann@progress-technologies.net> Architecture: amd64 Depends: libc6 (>= 2.4) Description-en: Traces the route taken by packets over an IPv4/IPv6 network The traceroute utility displays the route used by IP packets on their way to a specified network (or Internet) host. Traceroute displays the IP number and host name (if possible) of the machines along the route taken by the packets. Traceroute is used as a network debugging tool. If you're having network connectivity problems, traceroute will show you where the trouble is coming from along the route. . Install traceroute if you need a tool for diagnosing network connectivity problems. Homepage: http://traceroute.sourceforge.net/ Description-md5: 8a3a47eccb961a38576ee994d96f3d2c Tag: implemented-in::c, interface::commandline, network::routing, protocol::TODO, protocol::ip, role::program, scope::utility, use::checking, use::monitor, use::routing Section: net Priority: important Filename: pool/main/t/traceroute/traceroute_2.0.18-3_amd64.deb Size: 50980 MD5sum: 1e74098ae307c76eacbc60824d574fb0 SHA1: 6696a0337267788c56cfe1eb68ea7ee5b3c2129c SHA256: 305c52bc40d8c23f34e4aee1d2e56687476a57bdd83d5f984c95f174ae388b46 So the uptream developer is at http://traceroute.sourceforge.net/