Function mdcat::dump_states

pub fn dump_states<'a, 'e, W, I>(
    settings: &Settings, 
    environment: &Environment, 
    writer: &'a mut W, 
    events: I
) -> Result<(), Error> where
    I: Iterator<Item = Event<'e>>,
    W: Write, 

Write as push_tty would, but ignore actual output and instead write states and events.