colortbl: Overhang specs for `\cellcolor` not working

[urob]

With the colortbl package, the optional overhang argument seems to be ignored when using \cellcolor. E.g., \cellcolor{red}[0pt] content prints [0pt] content into the corresponding table cell.

BTW, I'm not sure whether overhang specs are supposed to work with \cellcolor, but it isn't evident from the documentation that they shouldn't.