Function arg_input::input_lines

pub fn input_lines<I, J, S>(inputs: I) -> Result<Lines, InputError> where
    I: IntoIterator<Item = S, IntoIter = J>,
    J: ExactSizeIterator<Item = S>,
    S: AsRef<Path>, 

Return an iterator over all lines of input.

See input() for how this handles its arguments/errors.