CSS3 syntax

I have been implementing a CSS3 parser, and I have noted what is
probably a minor mistake in the CSS3 syntax document:
http://www.w3.org/TR/2003/WD-css3-syntax-20030813/
In section 4.2. Tokenization

urlchar 	::= 	[#x9#x21#x23-#x26#x27-#x7E] | nonascii | escape

stringchar 	::= 	urlchar | #x20 | '\' nl

string 	::= 	'"' (stringchar | "'")* '"' | "'" (stringchar | '"')* "'"

The point where I note a potential problem is with #x27 being in the
urlchar accepted character range, which creates a problem in
single-quoted strings where the terminating single-quote will be read
as a part of the string.

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