Use 'change' instead of 'delete' for `2ct`

I think it's clearer to say that `2ct` *changes* rather than deletes.

And here's a cat gif:

![248 gif pagespeed ce vyrdmkspzi](https://cloud.githubusercontent.com/assets/6104/3941927/184c212a-254a-11e4-8fe3-69f5e8de9980.gif)