class Spec::Matchers::NegativeOperatorMatcher

def __delegate_method_missing_to_target(operator, expected)
  ::Spec::Matchers.generated_description = "should not #{operator} #{expected.inspect}"
  return true unless @target.send(operator, expected)
  return fail_with_message("expected not: #{operator} #{expected.inspect},\n         got: #{operator.gsub(/./, ' ')} #{@target.inspect}")
end