Adding a snippet of css in a theme

[branchandroot]

So let us suppose that I'm making a theme for a layout that already uses the print_stylesheet function (a theme for Modish, in the event). Let us further suppose that I want to add a little bit of css to this theme without copying the whole inherited stylesheet just to change one line. Does anyone know of a good way to do this?

Comments

[mmmag]

If the theme is in use, couldn't you just use the customization wizard (custom css) to do that?

[branchandroot]

It's a theme I'm making, so part of the point is that this css scrap needs to be a default.