From Fedora Project Wiki
Add / to end of directories
Can someone please add a trailing slash to %dir content so that it's more clear we're talking about directories? For example
%dir %{_libdir}/foo-2/fu
%dir %{_libdir}/foo-2/bar
%{_libdir}/foo-2/fu/*.so
%{_libdir}/foo-2/bar/config*
would read better as
%dir %{_libdir}/foo-2/fu/
%dir %{_libdir}/foo-2/bar/
%{_libdir}/foo-2/fu/*.so
%{_libdir}/foo-2/bar/config*