bracket makes various kinds of braces: (left, right, up, down) lbracket x y width height [linewidth] [color] [opacity] rbracket x y width height [linewidth] [color] [opacity] ubracket x y width height [linewidth] [color] [opacity] dbracket x y width height [linewidth] [color] [opacity]
(w io.Writer, s []string, linenumber int)