/usr/lib/R/site-library/RGtk2/demo/ is in r-cran-rgtk2 2.20.31-2.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/R/site-library/RGtk2/demo/alphaSlider.R
/usr/lib/R/site-library/RGtk2/demo/alphaSliderClass.R
/usr/lib/R/site-library/RGtk2/demo/appWindow.R
/usr/lib/R/site-library/RGtk2/demo/assistant.R
/usr/lib/R/site-library/RGtk2/demo/builder.R
/usr/lib/R/site-library/RGtk2/demo/buttonBoxes.R
/usr/lib/R/site-library/RGtk2/demo/clipboard.R
/usr/lib/R/site-library/RGtk2/demo/colorSelector.R
/usr/lib/R/site-library/RGtk2/demo/compositeplot.R
/usr/lib/R/site-library/RGtk2/demo/dnd.R
/usr/lib/R/site-library/RGtk2/demo/drawingArea.R
/usr/lib/R/site-library/RGtk2/demo/editableCells.R
/usr/lib/R/site-library/RGtk2/demo/entryCompletion.R
/usr/lib/R/site-library/RGtk2/demo/expander.R
/usr/lib/R/site-library/RGtk2/demo/fileCopier.R
/usr/lib/R/site-library/RGtk2/demo/iconView.R
/usr/lib/R/site-library/RGtk2/demo/iconviewdnd.R
/usr/lib/R/site-library/RGtk2/demo/images.R
/usr/lib/R/site-library/RGtk2/demo/messageDialog.R
/usr/lib/R/site-library/RGtk2/demo/multipleViews.R
/usr/lib/R/site-library/RGtk2/demo/pangoCairo.R
/usr/lib/R/site-library/RGtk2/demo/pixbufs.R
/usr/lib/R/site-library/RGtk2/demo/printing.R
/usr/lib/R/site-library/RGtk2/demo/rgtkplot.R
/usr/lib/R/site-library/RGtk2/demo/rotatedText.R
/usr/lib/R/site-library/RGtk2/demo/searchentry.R
/usr/lib/R/site-library/RGtk2/demo/sizeGroups.R
/usr/lib/R/site-library/RGtk2/demo/slide.R
/usr/lib/R/site-library/RGtk2/demo/spinner.R
/usr/lib/R/site-library/RGtk2/demo/svgspacewar.R
/usr/lib/R/site-library/RGtk2/demo/text-scroll.R
/usr/lib/R/site-library/RGtk2/demo/tooltips.R
/usr/lib/R/site-library/RGtk2/demo/treeStore.R