It does say > A single_line_raw_string_literal cannot represent a string value that starts or ends with a quote (") though an augmentation to this proposal is

It does say > A single_line_raw_string_literal cannot represent a string value that starts or ends with a quote (") though an augmentation to this proposal is provided in the Drawbacks section that shows how that could be supported. so I'd assume the odd count would lead to an error (single trailing "?) rather than a string containing ". E: I'd assume it doesn't allow empty single line strings because otherwise how do you tell the difference between that and the start of a multi line one?