Method add

repl/src/editor.rs:683–686

Registers a new expected side-effect `co` on the console.

(mut self, co: CapturedOut)

        /// Registers a new expected side-effect `co` on the console.
        fn add(mut self, co: CapturedOut) -> Self {
            self.output.push(co);
            self
        }

        /// Registers that the file has been modified.
        fn set_dirty(mut self) -> Self {