<documentation title="Array Bracket Spacing">
    <standard>
    <![CDATA[
    When referencing arrays you should not put whitespace around the opening bracket or before the closing bracket.
    ]]>
    </standard>
    <code_comparison>
        <code title="Valid: No spaces around the brackets.">
        <![CDATA[
$foo<em></em>[<em></em>'bar'<em></em>];
]]>
        </code>
        <code title="Invalid: Spaces around the brackets.">
        <![CDATA[
$foo<em> </em>[<em> </em>'bar'<em> </em>];
]]>
        </code>
    </code_comparison>
</documentation>