<document source="test data">
    <section ids="perl-test" names="perl test">
        <title>
            Perl Test
        <paragraph>
            Check to see if passing variables in on the command line via \n\
            <literal>
                -D perl='expression'
             work.
        <system_message level="1" line="7" source="test data" type="INFO">
            <paragraph>
                No directive entry for "perl" in module "Text::Restructured::Directive".
                Trying "perl" as canonical directive name.
        <literal_block source="perl directive at test data, line 7" xml:space="preserve">
            $a=0 and $b=1
        <paragraph>
            A paragraph.
