Macro appendln 

macro_rules! appendln {
    ($s:expr $(, $($items:tt)*)?) => { ... };
}

Push a line (with newline) to a string efficiently.

Equivalent to appends! followed by a newline character.

Examples

use vize_l0::appendln;

let mut s = String::new();
appendln!(s, "Hello, world!");
assert_eq!(s, "Hello, world!\n");