/usr/share/gnome/help/shotwell/C/ is in shotwell-common 0.18.0-0ubuntu4.
This file is owned by root:root, with mode 0o755.
..
/usr/share/gnome/help/shotwell/C/edit-adjustments.page
/usr/share/gnome/help/shotwell/C/edit-crop.page
/usr/share/gnome/help/shotwell/C/edit-enhance.page
/usr/share/gnome/help/shotwell/C/edit-external.page
/usr/share/gnome/help/shotwell/C/edit-nondestructive.page
/usr/share/gnome/help/shotwell/C/edit-redeye.page
/usr/share/gnome/help/shotwell/C/edit-rotate.page
/usr/share/gnome/help/shotwell/C/edit-straighten.page
/usr/share/gnome/help/shotwell/C/edit-time-date.page
/usr/share/gnome/help/shotwell/C/edit-undo.page
/usr/share/gnome/help/shotwell/C/figures/
/usr/share/gnome/help/shotwell/C/figures/crop_thirds.jpg
/usr/share/gnome/help/shotwell/C/figures/edit_toolbar.png
/usr/share/gnome/help/shotwell/C/figures/editing_overview.png
/usr/share/gnome/help/shotwell/C/figures/shotwell_logo.png
/usr/share/gnome/help/shotwell/C/figures/trash_process.png
/usr/share/gnome/help/shotwell/C/formats.page
/usr/share/gnome/help/shotwell/C/import-camera.page
/usr/share/gnome/help/shotwell/C/import-f-spot.page
/usr/share/gnome/help/shotwell/C/import-file.page
/usr/share/gnome/help/shotwell/C/import-memorycard.page
/usr/share/gnome/help/shotwell/C/index.page
/usr/share/gnome/help/shotwell/C/organize-event.page
/usr/share/gnome/help/shotwell/C/organize-flag.page
/usr/share/gnome/help/shotwell/C/organize-rating.page
/usr/share/gnome/help/shotwell/C/organize-remove.page
/usr/share/gnome/help/shotwell/C/organize-search.page
/usr/share/gnome/help/shotwell/C/organize-tag.page
/usr/share/gnome/help/shotwell/C/organize-title.page
/usr/share/gnome/help/shotwell/C/other-files.page
/usr/share/gnome/help/shotwell/C/other-missing.page
/usr/share/gnome/help/shotwell/C/other-multiple.page
/usr/share/gnome/help/shotwell/C/other-plugins.page
/usr/share/gnome/help/shotwell/C/raw.page
/usr/share/gnome/help/shotwell/C/running.page
/usr/share/gnome/help/shotwell/C/share-background.page
/usr/share/gnome/help/shotwell/C/share-export.page
/usr/share/gnome/help/shotwell/C/share-print.page
/usr/share/gnome/help/shotwell/C/share-send.page
/usr/share/gnome/help/shotwell/C/share-slideshow.page
/usr/share/gnome/help/shotwell/C/share-upload.page
/usr/share/gnome/help/shotwell/C/view-displaying.page
/usr/share/gnome/help/shotwell/C/view-information.page
/usr/share/gnome/help/shotwell/C/view-sidebar.page