Merge pull request #1387 from LujunWeng/more-readable-parameters

make ellipse parameter names more readable

Author: Lauren McCarthy

src/core/2d_primitives.js

@@ -127,10 +127,10 @@ p5.prototype.arc = function(x, y, w, h, start, stop, mode) {
  * origin may be changed with the ellipseMode() function.
  *
  * @method ellipse
- * @param  {Number} a x-coordinate of the ellipse.
- * @param  {Number} b y-coordinate of the ellipse.
- * @param  {Number} c width of the ellipse.
- * @param  {Number} d height of the ellipse.
+ * @param  {Number} x x-coordinate of the ellipse.
+ * @param  {Number} y y-coordinate of the ellipse.
+ * @param  {Number} w width of the ellipse.
+ * @param  {Number} h height of the ellipse.
  * @return {p5}       the p5 object
  * @example
  * <div>