Example
Break regular string literals with the \ character
let a = "foobar";
let b = "foo\
bar";
// `a` and `b` are equal.
assert_eq!(a,b);
Break raw-string literals to separate strings, and join them with the concat! macro
let c = r"foo\bar";
let d = concat!(r"foo\", r"bar");
// `c` and `d` are equal.
assert_eq!(c, d);
