feat: for compatibility, code also have language

[zaratan]

Some PrismJS themes expect <code> to also carry the language.

[hswolff]

Would love to see this merged! When porting from Gatsby to Next.js I noticed this as a difference between how the two rendered.

[zaratan]

@hswolff that's exactly why I created that PR. I'm using my fork now and everything is working perfectly.

[sergioramos]

Thank you so much for this @zaratan 👍

I just have a couple of questions, and will merge if you don't mind answering.

[zaratan]

That said. Maybe this should be put behind a compatible_mode option flag. What do you think @sergioramos ?

[zaratan]

@sergioramos language-unknown seems better than language- and those theme would still work. IMO we don't need a compatibility flag on top of this then.

[sergioramos]

thank you very much @zaratan 👍

[zaratan]

Thank you for this project. It works very well :)