restrictReferences leaves behind extra empty <dt> elements

[AmeliaBR]

The W3C pubrules checker is complaining to me about invalid HTML:

Element “dl” is missing a required instance of child element “dd”.

The immediate culprit seems to be the restrictReferences script in resolveReferences.js: It removes the <dd> definitions, and the <dfn> wrapping the term, but not the <dt>.

I'm not quite sure why there are redundant <dfn> inside <dt> in the first place, and maybe the person who wrote the script wasn't expecting them, either? I haven't taken the time to review the JS code, so I don't know how easy a fix it will be.

Regardless: all these empty <dt> elements are invisible in the final visual layout, but not to pubchecker & maybe not screenreader users.