The `caution` directive is provided by the
[[!iki plugins/admonition desc=admonition]] plugin.

The following markup:

    \[[!caution "Lorem ipsum dolor sit amet, consectetuer adipiscing elit."]]

Will show:

<div class="caution">Lorem ipsum dolor sit amet, consectetuer adipiscing elit.</div>

It generates the following HTML, which is the equivalent:

    <div class="caution">Lorem ipsum dolor sit amet, consectetuer adipiscing elit.</div>

Other admonitions are available, see
[[!iki plugins/admonition desc=admonition]] for more and rationale.
