Is there a name for "must document" code. For me it's any regex. Every single piece of regex should be documented, no matter how simple. Even if it's only for y

Is there a name for "must document" code. For me it's any regex. Every single piece of regex should be documented, no matter how simple. Even if it's only for your own use, you will forget the intent. I'm fixing up some old shell scripts - any single quotes with variables now get documented - sometimes you want to pass them to another shell or program so it IS intentional.