34  * and optionally sets a soft margin.
80 	long cols, i, inc, j, margin, nstops, stops[NSTOPS];  in main()  local
87 	margin = 0;  in main()
96 				margin = strtol(arg, &end, 10);  in main()
97 				if (errno != 0 || *end != '\0' || margin < 0)  in main()
98 					errx(1, "%s: invalid margin width",  in main()
101 				margin = 10;  in main()
156 	 * Set soft margin.  in main()
160 		printf("%*s", (int)margin, "");  in main()
162 	} else if (margin != 0)  in main()
163 		warnx("terminal cannot set left margin");  in main()