How do I get the lines of code off

when a person fills out my jot form and goes to the last (Thank You ) page it has lines of source code with my information in it. how do i get rid of that? It was not there before 

If you are referring to this information:

You can edit the Thank you page by going Settings-Thank you page:

And simply change or delete the information from there.

Let us know if you have any further questions.

Thank you!