 the relevant line in the test or by adding --log_level=messages
        to your command line,...). In that case, and if you are running interactively,
        you may in addition define the symbol BOOST_INTERACTIVE_TEST_INPUT_ITERATOR
        to interactively test the input operator with input of your choice from the
        standard input (instead of hard-coding it in the test).
      </p>
</div>
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