/usr/lib/ruby/vendor_ruby/active_support/core_ext/string/xchar.rb is in ruby-activesupport-2.3 2.3.14-2.
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 | begin
# See http://bogomips.org/fast_xs/ by Eric Wong
require 'fast_xs'
class String
alias_method :original_xs, :to_xs if method_defined?(:to_xs)
alias_method :to_xs, :fast_xs
end
rescue LoadError
# fast_xs extension unavailable.
end
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