/usr/lib/ruby/vendor_ruby/active_support/core_ext/range.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 | require 'active_support/core_ext/range/blockless_step'
require 'active_support/core_ext/range/conversions'
require 'active_support/core_ext/range/include_range'
require 'active_support/core_ext/range/overlaps'
require 'active_support/core_ext/range/cover'
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