<!-- This test case represents HTML Tidy issue #839, which describes a descrepancy between tidy's behavior and the W3C Nu HTML checker behavior. Tidy has historically allowed empty <title> elements, but this is not allowed by HTML5, and is flagged by the Nu checker. Because a <title> is required by HTML5, it would be even worse for HTML Tidy to remove this element, and so Tidy will now provide a warning if the title element is empty. It is assumed the HTML author will add a title as well as addressing other warnings. --> <!DOCTYPE html><title></title>