Some text with a [[WikiLink]].
A link with [[ white space and_underscores ]] and a empty [[ ]] one.
Another with [[double spaces]] and [[double__underscores]] and
one that [[has _emphasis_ inside]] and one [[with_multiple_underscores]]
and one that is _[[emphasised]]_.
And a <a href="http://example.com/RealLink">RealLink</a>.
<http://example.com/And_A_AutoLink>
And a [MarkdownLink](/MarkdownLink/ "A MarkdownLink") for
completeness.