/usr/lib/ruby/vendor_ruby/activerecord.rb is in ruby-activerecord-2.3 2.3.14-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 | require 'active_record'
ActiveSupport::Deprecation.warn 'require "activerecord" is deprecated and will be removed in Rails 3. Use require "active_record" instead.'
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