[https://github.com/nim-lang/Nim/blob/version-1-0/lib/pure/htmlgen.nim#L314](https://github.com/nim-lang/Nim/blob/version-1-0/lib/pure/htmlgen.nim#L314)
Is this on purpose? I need it for auto-hyphenation.
- htmlgen `html` macro doesn't allow lang attribute benji
