doctest failure in src/constructionandconversion.md:146-155 ```jldoctest example julia> col = colorant"yellow" RGB{N0f8}(1.0,1.0,0.0) julia> transparent = alphacolor(col, 0.5) # or coloralpha(col) ARGB{N0f8}(1.0,1.0,0.0,0.502) julia> opaque = color(transparent) RGB{N0f8}(1.0,1.0,0.0) ``` Subexpression: opaque = color(transparent) Evaluated output: ERROR: MethodError: objects of type RGB{N0f8} are not callable Stacktrace: [1] top-level scope @ none:1 Expected output: RGB{N0f8}(1.0,1.0,0.0) diff = Warning: Diff output requires color. RGB{N0f8}(1.0,1.0,0.0)ERROR: MethodError: objects of type RGB{N0f8} are not callable Stacktrace: [1] top-level scope @ none:1