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:15:5
   |
LL |     format!("{}", "foo");
   |     ^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `"foo".to_string();`

error: useless use of `format!`
  --> $DIR/format.rs:19:5
   |
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:20:5
   |
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:25:5
   |
LL |     format!("{}", arg);
   |     ^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `arg.to_string();`

error: useless use of `format!`
  --> $DIR/format.rs:29:5
   |
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:30:5
   |
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:57:5
   |
LL |     format!("{}", 42.to_string());
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: `to_string()` is enough: `42.to_string();`

error: useless use of `format!`
  --> $DIR/format.rs:59:5
   |
LL |     format!("{}", x.display().to_string());
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: `to_string()` is enough: `x.display().to_string();`

error: aborting due to 9 previous errors