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Remove dependency on the behavior of perl for reliable creation of Unicode file names on Windows.
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Also add test cases for additional coverage on image optimization.
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This hasn't worked or been exercised in years since Adobe stopped releasing a Linux version of reader.
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When linearizing a file or getting the list of all pages in a file, detect if the pages tree contains a duplicated page object and, if so, shallow copy it. This makes it possible to have a one to one mapping of page positions to page objects.
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Reported in debian bug 902642
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If we are unable to filter a page's content streams, don't attempt to remove objects from the page's resource dictionary. Also provide a command line option to suppress resource removal in case we ever need this as a workaround for some bug or broken PDF files.