According to w3 guidelines, a space should be included before the trailing / and > of empty elements, for example, <br />. These guidelines are for XHTML documents to render on existing HTML user agents.
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I don't think your example works as intended.
Also, why is that? Does the space do something to make the HTML more understandable to some interpreters?
edited my comment
According to w3 guidelines, a space should be included before the trailing / and > of empty elements, for example,
<br />. These guidelines are for XHTML documents to render on existing HTML user agents.