/usr/lib/ruby/1.9.1/ripper.rb is in libruby1.9.1 1.9.3.0-1ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 | require 'ripper/core'
require 'ripper/lexer'
require 'ripper/filter'
require 'ripper/sexp'
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