/usr/lib/ruby/vendor_ruby/active_support/core_ext/object.rb is in ruby-activesupport-3.2 3.2.16-2.
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 10 11 12 13 | require 'active_support/core_ext/object/acts_like'
require 'active_support/core_ext/object/blank'
require 'active_support/core_ext/object/duplicable'
require 'active_support/core_ext/object/try'
require 'active_support/core_ext/object/inclusion'
require 'active_support/core_ext/object/conversions'
require 'active_support/core_ext/object/instance_variables'
require 'active_support/core_ext/object/to_json'
require 'active_support/core_ext/object/to_param'
require 'active_support/core_ext/object/to_query'
require 'active_support/core_ext/object/with_options'
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