#!/usr/bin/env ruby require "prawn" pdf = Prawn::Document.new pdf.line_width = 20 p pdf.cap_style y = 100 [:butt, :round, :projecting_square].each do |s| pdf.cap_style(s) pdf.move_to(100, y) pdf.line_to(150, y) pdf.line_to(150, y-50) pdf.s…