Linus Groh 9f036959e8 LibJS: Report correct line/column for string literal syntax errors ...

We're passing a token to this function, so m_current_token is actually
the next token - which leads to incorrect line/column numbers for string
literal syntax errors:

    "\u"
        ^
    Uncaught exception: [SyntaxError]: Malformed unicode escape sequence (line: 1, column: 5)

Rather than:

    "\u"
    ^
    Uncaught exception: [SyntaxError]: Malformed unicode escape sequence (line: 1, column: 1)

2020-10-24 16:34:01 +02:00

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