Today, I happened to use a raw string that wasn't highlighted correctly in Rust. The problem was that using a . in a regex in SEQ_REGEXP does not match newlines, so I switched to using SPAN_REGEXP. I also added HASH_CHAR to a couple tags.
I updated the file I've been using for testing to include the string that wasn't highlighted correctly:
https://gist.github.com/jminer/401fafd13107d512a40f
I didn't notice that adding HASH_CHAR to the rule that highlights lifetimes broke the character literal rule. I've added HASH_CHARS to that rule and it works again. The first patch can be ignored, and this one used instead.
Committed 24448