Minor nit: it's an nstring, which can be either quoted (no length), or a literal string (with a length, as you show in your example). I think most servers send a literal or perhaps NIL, though.
Yes, in a way: In this case, it's an answer to "Header Fields", which include CRLF. Thus, it MUST be a literal string (sorry, I was using the wrong term). Even so, for using a quoted string, the Doublequotes would be missing...
The department of completely impractical pedantry would like to point out that the following is legal, provided the message has no body:
C: a fetch 1 body.peek[header.fields (mumble)]
S: * 1 fetch (body[header.fields ("mumble")] "")
S: a okI have a vague memory of having seen that in real life, too.
--Arnt
