Groups/replace.js example is broken

[Nelson Alexandre]

This is broken because Sprite#group returns undefined. This could be fixed by adding the property to the Sprite class, but since I'm new to Phaser don't know why was it changed.
/**

• @name Phaser.Sprite#group
• @Property {string} group - If Sprite is in a group return the group name
  */
  Object.defineProperty(Phaser.Sprite.prototype, "group", {
  get: function () {
  if (parent && parent.type == Phaser.GROUP)
  {
  return this.parent.name;
  }
  else
  {
  return null;
  }
  }
  });

You also need to add the names to the groups after creating them:
left.name = "left";
right.name = "right";

or at game.add.group() time

[Richard Davey]

Good catch. This is now fixed.