How do I specify a production rule allowing a literal `DQUOTE`?
For example, check out [RFC 2045](https://tools.ietf.org/html/rfc2045#appendix-A). They appear to use `prose-val` to specify a literal double quote `<">`, but it would seem that `char-val` otherwise allows `"""`. Both options cause a "run-on" quoted string in the syntax highlighting (see screenshot).
The formal [ABNF](https://tools.ietf.org/html/rfc5234) specification specifies:
```
char-val = DQUOTE *(%x20-21 / %x23-7E) DQUOTE
prose-val = "<" *(%x20-3D / %x3F-7E) ">"
```
Also, thanks a lot for making this!
Weird that I completely missed `prose-val` while going through RFC 5234. 🤔 I've amended this in 422d721; thanks for bringing it to my attention.
> but it would seem that `char-val` otherwise allows `"""`
Where did you read that? The formal definition of `char-val` explicitly excludes `DQUOTE` (U+0022) from its permitted character range:
~~~abnf
char-val = DQUOTE *(%x20-21 / %x23-7E) DQUOTE
; quoted string of SP and VCHAR
; without DQUOTE
~~~
> I've amended this in 422d721; thanks for bringing it to my attention.
Thank you! :)
> The formal definition of char-val explicitly excludes DQUOTE.
Yep, good point. I misread the definition. Thanks again!
Glad to help! I've just [cut a release](https://github.com/Alhadis/language-grammars/releases/tag/v1.0.2), so the recent fixes should be available to you immediately.