Is that common to have a programmer have a notepad in front of him/her keep track of code that was modified (ie: list before and after code comparison, line location from the IDE)?
I figure if someone modifies something, there might be a chance something else might break in a different area of the program. So this would be a good way to revert the issue.
I never worked in the industry. I am still a CS undergraduate but I was curious about whether or not this is actually how it works in industry.