I don't think it's a silly question. I suspect (though I don't know for certain) that in the context of a double quote, the @files array isn't considered a set of fields, and so is printed as a straight array. I could see there being a distinction made between data outside the quotes, and inside. I don't know whether this is a feature, though.

In reply to Re: Problem in OUTPUT_FIELD_SEPARATOR by spiritway
in thread Problem in OUTPUT_FIELD_SEPARATOR by Samy_rio

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