#013267: consider trim()'ing text in docbook conversion from reST

Using reST code as seen below gives me the following XML:

<?xml version="1.0"?>
<article xmlns="http://docbook.org/ns/docbook">
<section id="document_title">
<sectioninfo/>
<title> Document Title </title>
</section>
</article>

Seems like it should rather produce:

<?xml version="1.0"?>
<article xmlns="http://docbook.org/ns/docbook">
<section id="document_title">
<sectioninfo/>
<title>Document Title</title>
</section>
</article>

Operating System:
PHP Version: (please be specific, like '4.4.3' or '5.1.5')
Database and version:
Browser (and version):

$string = <<<EOT
===================
Document Title
===================
EOT;