In my experience developers develop their own "unique style" to deal with with this problem. Most often it is horrible pile of mess. Often without unit tests si

In my experience developers develop their own "unique style" to deal with with this problem. Most often it is horrible pile of mess. Often without unit tests since they do not give much feedback. And acceptance criteria is simple "it compiles and prints ok". With short iterative changes I have unit tests and fine grained git history, to untangle it.