It is. But even if it is strongly discouraged, some people will commit it anyway. Look at any beginner's repository, there is a high chance it contains files co

It is. But even if it is strongly discouraged, some people will commit it anyway. Look at any beginner's repository, there is a high chance it contains files compiled from the source of the repo (executable, .pyc, ...), the developer's IDE config (.vscode, ...), __MACOSX, ...