pub fn state_invalid(my_name: &String) -> String {
    format!(
        "something is wrong with the timeline of {0}",
        my_name
    )
}
// should not appear for visualization in a correct program
should not appear for visualization in a correct program
should not appear for visualization in a correct program
pub fn state_invalid(my_name: &String) -> String {
    format!(
        "something is wrong with the timeline of {0}",
        my_name
    )
}
pub fn state_invalid ( my_name : & String ) -> String { format ! ( " " my_name ) }
should not appear for visualization in a correct program
should not appear for visualization in a correct program
my_name
&String