"]]" inside an `expect` breaks updating

[ecstatic-morse]

The current code does a simple search for the character sequence ]] to determine the end of an expect![[ macro invocation. However, expect takes a string, and "]]" is perfectly valid as part of a string.

[matklad]

Yeah… we should’t be adding a real Rust parser here, but it makes sense to make heuristic more robust to the practical cases. Here, I think it makes sense to verify that symbols before ]] are quote/hash and whotespace

[ecstatic-morse]

we should’t be adding a real Rust parser here

@matklad Interesting. I thought this would be the solution. Is this just to avoid a syn dependency? You could also go half way and write/steal a tokenizer for just string literals. I'll write the simple regex in the meantime. Maybe we can discuss on the PR.