Playground syntax highlight grammar breaks when using template literals

[KrofDrakula]

Was playing around with the online playground and noticed that template strings break highlighting when using interpolation:

The file still parses correctly but the highlighting is broken from that point onwards.

[hildjj]

Good catch. I'm going to mark this one as "help wanted", and see if someone who knows how the highlighting works can send a PR.

[KrofDrakula]

Might be related to #296.

[reverofevil]

Yeah, it's been a problem of CodeMirror's JS grammar for ages. Really should switch from CM to something else.

[hildjj]

Let's talk about options on #296. I agree that's the correct, lowest-effort approach to solving this.

Going to close this as a dup.