* the second, with the next token_from_line() call starting its token search
* after that second quote. The only way to return an empty string (instead of
* NULL) as a token is to delimit the token by two succeeding single quotes.
* the second, with the next token_from_line() call starting its token search
* after that second quote. The only way to return an empty string (instead of
* NULL) as a token is to delimit the token by two succeeding single quotes.