/usr/share/gtk-doc/html/libgwyprocess/ is in libgwyddion20-doc 2.26-1ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/gtk-doc/html/libgwyprocess/GwyCDLine.html
/usr/share/gtk-doc/html/libgwyprocess/GwyCalData.html
/usr/share/gtk-doc/html/libgwyprocess/GwyCalibration.html
/usr/share/gtk-doc/html/libgwyprocess/GwyDataField.html
/usr/share/gtk-doc/html/libgwyprocess/GwyDataLine.html
/usr/share/gtk-doc/html/libgwyprocess/GwyGrainValue.html
/usr/share/gtk-doc/html/libgwyprocess/GwySpectra.html
/usr/share/gtk-doc/html/libgwyprocess/GwyTriangulation.html
/usr/share/gtk-doc/html/libgwyprocess/home.png
/usr/share/gtk-doc/html/libgwyprocess/index.html
/usr/share/gtk-doc/html/libgwyprocess/index.sgml
/usr/share/gtk-doc/html/libgwyprocess/left.png
/usr/share/gtk-doc/html/libgwyprocess/libgwyprocess-arithmetic.html
/usr/share/gtk-doc/html/libgwyprocess/libgwyprocess-correct.html
/usr/share/gtk-doc/html/libgwyprocess/libgwyprocess-correlation.html
/usr/share/gtk-doc/html/libgwyprocess/libgwyprocess-cwt.html
/usr/share/gtk-doc/html/libgwyprocess/libgwyprocess-dwt.html
/usr/share/gtk-doc/html/libgwyprocess/libgwyprocess-elliptic.html
/usr/share/gtk-doc/html/libgwyprocess/libgwyprocess-filters.html
/usr/share/gtk-doc/html/libgwyprocess/libgwyprocess-fractals.html
/usr/share/gtk-doc/html/libgwyprocess/libgwyprocess-grains.html
/usr/share/gtk-doc/html/libgwyprocess/libgwyprocess-gwyprocess.html
/usr/share/gtk-doc/html/libgwyprocess/libgwyprocess-gwyprocessenums.html
/usr/share/gtk-doc/html/libgwyprocess/libgwyprocess-hough.html
/usr/share/gtk-doc/html/libgwyprocess/libgwyprocess-interpolation.html
/usr/share/gtk-doc/html/libgwyprocess/libgwyprocess-inttrans.html
/usr/share/gtk-doc/html/libgwyprocess/libgwyprocess-level.html
/usr/share/gtk-doc/html/libgwyprocess/libgwyprocess-linestats.html
/usr/share/gtk-doc/html/libgwyprocess/libgwyprocess-simpleFFT.html
/usr/share/gtk-doc/html/libgwyprocess/libgwyprocess-stats-uncertainty.html
/usr/share/gtk-doc/html/libgwyprocess/libgwyprocess-stats.html
/usr/share/gtk-doc/html/libgwyprocess/libgwyprocess-tip.html
/usr/share/gtk-doc/html/libgwyprocess/libgwyprocess.devhelp2
/usr/share/gtk-doc/html/libgwyprocess/right.png
/usr/share/gtk-doc/html/libgwyprocess/style.css
/usr/share/gtk-doc/html/libgwyprocess/up.png