The document says:
YUIDoc supports 3 main forms of formatting your documentation. HTML, Markdown, and Selleck.
So you can use HTML or Markdown as follows:
/** * Creates a blah-blah for blah-blahing blah. * * @constructor * @param {object} blah * * Follow recommendations at: * <a href="http://blah.com/boop">Boop</a> * Or * [Boop](http://blah.com/boop) * */
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