Method fmt

libs/error-stack/tests/test_debug.rs:303–305

(&self, fmt: &mut Formatter<'_>)

    impl Display for ContextC {
        fn fmt(&self, fmt: &mut Formatter<'_>) -> core::fmt::Result {
            fmt.write_str("A multiline\ncontext that might have\na bit more info")
        }
    }

    impl Error for ContextC {}