1 error: using `writeln!(v, "")`
2 --> $DIR/writeln_empty_string.rs:9:5
4 9 | writeln!(&mut v, "");
5 | ^^^^^^^^^^^^^^^^^^^^ help: replace it with: `writeln!(v)`
7 = note: `-D writeln-empty-string` implied by `-D warnings`
9 error: aborting due to previous error