There is supposed to be a white line: see https://chinstrap.canonical.com/~sabdfl/12_10/desktop_and_netbook/Dash/Home/dash_home_v1.png
There is supposed to be a white line: see https:/ /chinstrap. canonical. com/~sabdfl/ 12_10/desktop_ and_netbook/ Dash/Home/ dash_home_ v1.png