Update "colour.plotting.plot_RGB_colourspaces_in_chromaticity_diagram_CIE1931", "colour.plotting.plot_RGB_colourspaces_in_chromaticity_diagram_CIE1960UCS" and "colour.plotting.plot_RGB_colourspaces_in_chromaticity_diagram_CIE1976UCS" definitions signatures.
Update "colour.plotting.plot_RGB_colourspaces_in_chromaticity_diagram_CIE1931", "colour.plotting.plot_RGB_colourspaces_in_chromaticity_diagram_CIE1960UCS" and "colour.plotting.plot_RGB_colourspaces_in_chromaticity_diagram_CIE1976UCS" definitions signatures.

colour-science/colour