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(): `"foo {}/n/" bar".to_string();`

error: useless use of `format!`
  --> $DIR/format.rs:21:5
   |
LL |     format!("{}", "foo");
   |     ^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `"foo".to_string();`

error: useless use of `format!`
  --> $DIR/format.rs:25:5
   |
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:26:5
   |
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:31:5
   |
LL |     format!("{}", arg);
   |     ^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `arg.to_string();`

error: useless use of `format!`
  --> $DIR/format.rs:35:5
   |
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:36:5
   |
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:63:5
   |
LL |     format!("{}", 42.to_string());
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `42.to_string();`

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

error: aborting due to 12 previous errors