<documentation title="Arbitrary Parentheses Spacing">
<standard>
<![CDATA[
Arbitrary sets of parentheses should have no spaces inside.
]]>
</standard>
<code_comparison>
<code title="Valid: no spaces on the inside of a set of arbitrary parentheses.">
<![CDATA[
$a = (null !== $extra);
]]>
</code>
<code title="Invalid: spaces on the inside of a set of arbitrary parentheses.">
<![CDATA[
$a = ( null !== $extra );
]]>
</code>
<code title="Invalid: new lines on the inside of a set of arbitrary parentheses.">
<![CDATA[
$a = (
null !== $extra
);
]]>
</code>
</code_comparison>
</documentation>