Macro lines 

lines!() { /* proc-macro */ }

Replaces the literal with a literal of the lines.

Examples

Basic usage:

use lit_mod::lines;

assert_eq!(
    "Hello, world!",
    lines!("Hello, world!\nThis is lines", 0..1)
);
assert_eq!(
    "This is lines",
    lines!("Hello, world!\nThis is lines", -1..)
);