error: useless use of `format!`
  --> $DIR/format.rs:13:5
   |
LL |     format!("foo");
   |     ^^^^^^^^^^^^^^ help: consider using `.to_string()`: `"foo".to_string()`
   |
   = note: `-D clippy::useless-format` implied by `-D warnings`

error: useless use of `format!`
  --> $DIR/format.rs:14:5
   |
LL |     format!("{{}}");
   |     ^^^^^^^^^^^^^^^ help: consider using `.to_string()`: `"{}".to_string()`

error: useless use of `format!`
  --> $DIR/format.rs:15:5
   |
LL |     format!("{{}} abc {{}}");
   |     ^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using `.to_string()`: `"{} abc {}".to_string()`

error: useless use of `format!`
  --> $DIR/format.rs:16:5
   |
LL | /     format!(
LL | |         r##"foo {{}}
LL | | " bar"##
LL | |     );
   | |_____^
   |
help: consider using `.to_string()`
   |
LL ~     r##"foo {}
LL ~ " bar"##.to_string();
   |

error: useless use of `format!`
  --> $DIR/format.rs:21:13
   |
LL |     let _ = format!("");
   |             ^^^^^^^^^^^ help: consider using `String::new()`: `String::new()`

error: useless use of `format!`
  --> $DIR/format.rs:23:5
   |
LL |     format!("{}", "foo");
   |     ^^^^^^^^^^^^^^^^^^^^ help: consider using `.to_string()`: `"foo".to_string()`

error: useless use of `format!`
  --> $DIR/format.rs:27:5
   |
LL |     format!("{:+}", "foo"); // Warn when the format makes no difference.
   |     ^^^^^^^^^^^^^^^^^^^^^^ help: consider using `.to_string()`: `"foo".to_string()`

error: useless use of `format!`
  --> $DIR/format.rs:28:5
   |
LL |     format!("{:<}", "foo"); // Warn when the format makes no difference.
   |     ^^^^^^^^^^^^^^^^^^^^^^ help: consider using `.to_string()`: `"foo".to_string()`

error: useless use of `format!`
  --> $DIR/format.rs:33:5
   |
LL |     format!("{}", arg);
   |     ^^^^^^^^^^^^^^^^^^ help: consider using `.to_string()`: `arg.to_string()`

error: useless use of `format!`
  --> $DIR/format.rs:37:5
   |
LL |     format!("{:+}", arg); // Warn when the format makes no difference.
   |     ^^^^^^^^^^^^^^^^^^^^ help: consider using `.to_string()`: `arg.to_string()`

error: useless use of `format!`
  --> $DIR/format.rs:38:5
   |
LL |     format!("{:<}", arg); // Warn when the format makes no difference.
   |     ^^^^^^^^^^^^^^^^^^^^ help: consider using `.to_string()`: `arg.to_string()`

error: useless use of `format!`
  --> $DIR/format.rs:65:5
   |
LL |     format!("{}", 42.to_string());
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using `.to_string()`: `42.to_string()`

error: useless use of `format!`
  --> $DIR/format.rs:67:5
   |
LL |     format!("{}", x.display().to_string());
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using `.to_string()`: `x.display().to_string()`

error: useless use of `format!`
  --> $DIR/format.rs:71:18
   |
LL |     let _ = Some(format!("{}", a + "bar"));
   |                  ^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using `.to_string()`: `a + "bar"`

error: useless use of `format!`
  --> $DIR/format.rs:75:22
   |
LL |     let _s: String = format!("{}", &*v.join("/n"));
   |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using `.to_string()`: `(&*v.join("/n")).to_string()`

error: aborting due to 15 previous errors