I try to check if I put that word in my source code but I didn’t. Thinking that the error is with my browser I change I try with another browser but still the word is there.
I created another simple html page in other project and tried to load it in the browser that "Pro" was not on the page loaded. I tried also to see the source code of my page in the web browser I see the word is before <!DOCTYPE HTML>
Pro<!DOCTYPE HTML>