/usr/share/tdiary/contrib/plugin/en/ is in tdiary-contrib 5.0.8-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/tdiary/contrib/plugin/en/add_bookmark.rb
/usr/share/tdiary/contrib/plugin/en/category-lite.rb
/usr/share/tdiary/contrib/plugin/en/del_footer.rb
/usr/share/tdiary/contrib/plugin/en/git-register.rb
/usr/share/tdiary/contrib/plugin/en/livedoor_weather.rb
/usr/share/tdiary/contrib/plugin/en/microsummary.rb
/usr/share/tdiary/contrib/plugin/en/nicovideo.rb
/usr/share/tdiary/contrib/plugin/en/openid.rb
/usr/share/tdiary/contrib/plugin/en/profile.rb
/usr/share/tdiary/contrib/plugin/en/section_footer.rb
/usr/share/tdiary/contrib/plugin/en/section_footer2.rb
/usr/share/tdiary/contrib/plugin/en/socialbutton.rb