Merge pull request #6659 from diyaayay/bugfix/6653

bugfix #6653 vertexNormal() is not defined,replaces with normal

Author: davepagurek

src/webgl/p5.RendererGL.Immediate.js

@@ -167,13 +167,14 @@ p5.RendererGL.prototype.vertex = function(x, y) {
 
 /**
  * Sets the normal to use for subsequent vertices.
- * @method vertexNormal
+ * @private
+ * @method normal
  * @param  {Number} x
  * @param  {Number} y
  * @param  {Number} z
  * @chainable
  *
- * @method vertexNormal
+ * @method normal
  * @param  {Vector} v
  * @chainable
  */