DRYing line()

Removing duplication of logic. Switching line() from directly outputting to the PDF to calling lines().

Author: Ben Gribaudo

jspdf.js

@@ -994,10 +994,7 @@ var jsPDF = (function(global) {
 		};
 
 		API.line = function(x1, y1, x2, y2) {
-			out(
-				f2(x1 * k) + ' ' + f2((pageHeight - y1) * k) + ' m ' +
-				f2(x2 * k) + ' ' + f2((pageHeight - y2) * k) + ' l S');
-			return this;
+			return this.lines([[x2 - x1, y2 - y1]], x1, y1);
 		};
 
 		/**