Problem parsing empty span with label from latex.

[bmschmidt]

Getting error on imported latex including the following markdown:

[]{#tab:knn-metrics label="tab:knn-metrics"}

Looks like empty attributes

Uncaught (in promise) DOMException: Failed to execute 'setAttribute' on 'Element': '0' is not a valid attribute name.

[bmschmidt]

This markdown also appears to break

# Conflicts of Interest {#conflicts-of-interest .unnumbered}

[bmschmidt]

Removing the class sign fixes it.