class Cucumber::Formatter::Interceptor::Pipe

def self.unwrap!(pipe)
  validate_pipe pipe
  wrapped = nil
  case pipe
  when :stdout
    wrapped = $stdout
    $stdout = wrapped.unwrap! if $stdout.respond_to?(:unwrap!)
  when :stderr
    wrapped = $stderr
    $stderr = wrapped.unwrap! if $stderr.respond_to?(:unwrap!)
  end
  wrapped
end