/usr/lib/ruby/vendor_ruby/active_support/core_ext.rb is in ruby-activesupport-2.3 2.3.14-7.
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 | filenames = Dir["#{File.dirname(__FILE__)}/core_ext/*.rb"].sort.map do |path|
File.basename(path, '.rb')
end
# deprecated
filenames -= %w(blank)
filenames.each { |filename| require "active_support/core_ext/#{filename}" }
|