I don’t need to punitively reread “if there is an error, stop and return it to the caller” a thousand times a day, for the same reason that I don’t need to read

I don’t need to punitively reread “if there is an error, stop and return it to the caller” a thousand times a day, for the same reason that I don’t need to read the code that sets up a stack frame for a function call. I think I want an editor mode that just displays the 30% that does something.