Undoes the last incremental update to a PDF.
Incremental updates change a PDF without modifying the data already written
by appending the new information at the end.
Acrobat adds annotations this way,
and Multivalent PDF Merge with the -append option does too.
(Other Multivalent tools write a new file and are not applicable to
java tool.pdf.Undo [options] PDF-file
The undone version of the PDF is named with
- -inplace --
Modify the file in place, rather that writing a new one.
-undo appended to the original file name.