Test PDFs for the CTest tests (see ../CMakeLists.txt); ../../data has more
(see ../../data/README).

base.pdf, same.pdf, word.pdf, reflow.pdf, reordered.pdf, bold.pdf,
box.pdf, marginbox.pdf, inserted.pdf, boxes.pdf
    Generated by make-test-pdfs.sh, which describes how each differs from
    base.pdf, or for boxes.pdf what page boundaries it has.  Part of
    disparPDF, under the GPL version 2 or later.

rewritten-original.pdf, rewritten-gs.pdf
    Page 58 of Barak A. Pearlmutter, "An Investigation of the Gradient
    Descent Process in Neural Networks", technical report CMU-CS-96-114,
    Carnegie Mellon University, 1996: as published (PDF 1.4), and after
    rewriting it as PDF 1.7 with Ghostscript 10.08:
        gs -sDEVICE=pdfwrite -dCompatibilityLevel=1.7 -dNOPAUSE -dQUIET \
           -dBATCH -sOutputFile=rewritten.pdf CMU-CS-96-114.pdf
    (each then cut down to page 58 with qpdf).  Rewriting moves the text
    by a few thousandths of a point, which changes the order in which
    Poppler extracts some words although the words and their places are
    the same.  Contributed by the author, Barak A. Pearlmutter, under the
    GPL version 2 or later.
