/usr/lib/ruby/1.8/extlib/boolean.rb is in libextlib-ruby1.8 0.9.13-2.
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 | class TrueClass
def try_dup
self
end
end
class FalseClass
def try_dup
self
end
end
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