This tools (re)formats zone files keeping comments and $-pragmas intact. It does remove in-RR comments, i.e '; serial' and friends, although for SOA records these get added back.
Builds up-on: https://github.com/bwesterb/go-zonefile which is butchered and vendored in ./zonefile. (Only needed half of the functionality and comments weren't fleshed out.)
dnsfmt is a filter. See dnsfmt.1.md for more information.
