World when: #aboutToEnterWorld send:to:

I was trying a tutorial at
http://coweb.cc.gatech.edu/cs2340/2200

I ran doIt on this code in a workspace of a project

   World when: #aboutToEnterWorld send: start to: Demo1.

(after creating the Demo1 class and the class method start.

Basically, all it does is open a Transcript and write
a line or two of text. It works every time I open that project.

My primary question is where is the result of the doIt being stored?
I would like to be able to change it, disable it, remove it, etc.
What tool do I use to find this line of code in the image?

How is it that sending code like this one time can cause it to run every
time the project gets opened?

- dae