Draws a 1cm-wide swatch of the line in the side's own style, width and colour. Useful for previewing the exact look of a border before it is baked into an RTF document.
Usage
# S3 method for class 'rtf_border_line'
plot(x, ...)Examples
plot(rtf_border_line(style = "double", width = 30L, color = "#003366"))
