Fix PEAR bug 19683

Hello,

It seems that the unit tests failed (see PEAR bug #19683 <https://pear.php.net/bugs/bug.php?id=19683> only because the test case is not up-to-date.

This PR fix it and corresponding to implementation code : see default renderer lines 209 to 218

<https://github.com/pear/Console_CommandLine/blob/trunk/Console/CommandLine/Renderer/Default.php#L209>

Please push a QA release ASAP

- Laurent

PS : 

    C:\UwAmp\bin\php\php-5.3.20>phpunit C:\home\github\Console_CommandLine\tests\AllTests.php
    PHPUnit 3.7.10 by Sebastian Bergmann.

    .....................................................

    Time: 34 seconds, Memory: 5.25Mb

    OK (53 tests, 53 assertions)