pandoc/test/command/7546.md

```
% pandoc -t html -f native
Span ("", [], [("","")]) []
^D
<span></span>
```
HTML writer: Don't create invalid `data-` attribute... for empty attribute key. (It would be better to make these unrepresentable in the type system, but for now this is an improvement.) Closes #7546. 2021-11-19 17:50:18 +01:00			```
			`% pandoc -t html -f native`
			`Span ("", [], [("","")]) []`
			`^D`
			`<span></span>`
			```