<p>Already linked: <a href="http://example.com/">http://example.com/</a>.</p>

Already linked: [http://example.com/](http://example.com/).

Already linked: <a href="http://example.com/">http://example.com/</a>.

Already linked: <a href="http://example.com/">**http://example.com/**</a>.

Already linked: <a href="http://example.com/">*http://example.com/*</a>.

Already linked: <a href="http://example.com/">~~http://example.com/~~</a>.

Already linked: [http://example.com/].

Already linked: [http://example.com/][].

[http://example.com/]: http://example.com/
