[SPARK-4061][SQL] We cannot use EOL character in the operand of LIKE predicate.

We cannot use EOL character like \n or \r in the operand of LIKE predicate.
So following condition is never true.

    -- someStr is 'hoge\nfuga'
    where someStr LIKE 'hoge_fuga'


Ah, I see, we need to remove leading `\\`.