/usr/share/augeas/lenses/dist/iproute2.aug is in augeas-lenses 1.2.0-0ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 | module IPRoute2 =
autoload xfm
let empty = [ del /[ \t]*#?[ \t]*\n/ "\n" ]
let record = [ store /[0-9]+/ . del /[ \t]+/ "\t" . key /[a-zA-Z0-9]+/ . Util.comment_or_eol ]
let lns = ( empty | Util.comment | record ) *
let xfm = transform lns (incl "/etc/iproute2/*" . Util.stdexcl)
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