When OCR is run twice on a page, the question arises what to do with the old text. This patch prepends the new text to the old text allowing the user to immediately see the new text in the lower window while still preserving the old text in case it is valid. Users wanting to replace the old text must change the setting in the .gscan2pdf configuration file.
This patch is meant to be applied to changeset 827 in the mercurial repository.
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