foolproof error message done right

pdf2djvu error message: "I won't write DjVu data to a terminal."

Created by Peter Molnar <mail@petermolnar.net> , last modified at 2020-05-31 13:49 UTC, originally published at 2012-07-21 09:16 UTC, to canonical URL https://petermolnar.net/note/pdf2djvu/ .

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