message: Get rid of whitespace warnings
diff: @@ -50,7 +50,7 @@ fn test_string_literals() {
  assert_eq!(
  rune!(String => pub fn main() { "\
  a \
  -
  +\
  b" }),
  "a b"
  );
  @@ -73,7 +73,7 @@ fn test_byte_string_literals() {
  assert_eq!(
  rune!(Bytes => pub fn main() { b"\
  a \
  -
  +\
  b" }),
  b"a b"[..]
  );
  